Which Internal Filter Is Best For Your Tank? (Top Picks and Reviews – 2020)

For small fish tanks or lightly stocked with low filtration
needs, an internal filter can completely satisfy the water cleaning requirements.

Angel fish swimming in a small tank

Internal filters can also help you save money. The savings
can be reinvested in other accessories for your fin friends.

However, choosing the most appropriate internal filter for your tank is not a simple task. There are many brands on the market, and each brand has different models. How can you make the best choice?

In this article, we’re going to help you choose the best internal filter for your aquarium. Internal filters are brilliant for a few reasons:

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• Maintenance is easy and straightforward.
• The flow rates are usually optimized for smaller aquariums.
• They can be very quiet in operation.

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For these reasons, and more, we love internal filters.

Now, let us show you which ones we love the most.

Top 7 Internal Filters Quick Reference

We’ve prepared a simple table to show you the main features of each filter in this review.

You can glance quickly through this information and get an idea of which filter might be best for your tank. Afterwards, we’ll provide more information about each one so you can learn even more about your choice.

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In-Depth Filter Reviews

Now we’ll do a brief, intense dive into each of the filters we think you should consider. Their features, recommended fish, and other information will be laid out for you.

Have a look and make your best choice!

#1 - Whisper In-Tank Filter with BioScrubber for Aquariums

The Tetra Whisper In-Tank Filter is brilliant for small fish tanks. Tetra is best known for their fish foods. However, these filters are very reliable and work for years without much hassle.

The Whisper filter uses Tetra’s filter cartridges. These should be replaced every month or so. However, finding replacements is easy.

The filters use filter floss to capture debris in the water column. An activated carbon segment cleans and polishes the water. Finally, the crucial step of biological filtration is done by the BioScrubber pads located near the front of the filter.

The BioScrubber is
unique to Tetra’s filters. A solid plastic back forces water to flow evenly
over the entire area. Even flow means maximum exposure to the helpful bacteria
growing on the scrubbing bristles. This high level of filtration should keep
your tank fresh and clean.

One other nice feature is the water return method. Rather than using a powered jet of water, this filter creates a waterfall for your tank. Falling water becomes oxygenated and this boosts the health of your tank.

The loudness of the filter can be adjusted by changing the filter’s height or the water level.

Tetra’s Whisper
filters come in several different sizes to suit your needs. There is a mini
filter for 3-gallon tanks, a filter for 10-gallon tanks, 20-gallon tanks, and
the largest filter is rated for 40-gallon tanks.

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Freshwater fish
will really enjoy the benefits of this nice filter system. Some people have
found the flow rate to be too high for certain fish. Betta fish, for example,
may need special consideration so they are not caught by the filter’s current.

Pros:

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• Compact design fits easily in most tanks
• Simple clip requires no space outside the aquarium
• Easy maintenance achieved by swapping filter pads

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Cons:

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• Smaller filters do not come with suction cups
• Flow rate may be too high for slower fish

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#2 - Aqueon Quietflow E Internal Power Filter

Aqueon has created
a reliable, affordable power filter to fit inside your fish tank. Their E
Series of internal filters is designed to meet the needs of small aquarium
owners.

The first feature of these filters is the high flow rate available for the different filter sizes. Aqueon provides models suitable for use in 3-gallon tanks, 10-gallon tanks, 20-gallon tanks, and 40-gallon tanks.

Each size is equipped to produce a flow rate roughly equal to six times its size rating. This means the Aqueon 10 filters about 60 gallons of water per hour. The Aqueon 40 does better and moves around 290 gallons per hour. These flow rates are some of the highest available for these sizes.

All models are designed to manage chemical, biological, and mechanical filtration. This is ideal for removing solid debris, ammonia, nitrites, chemicals, and odors from the water. The filter media is about average in terms of its quality. However, the filter media is very easy to access and change.

Another great feature, which is easily overlooked, are the suction cups used for mounting the filter. There are four cups on the back of the smallest unit. Each suction cup is pretty big, and they work together to make the mounting very secure. Larger filters in the line use two clips as well as two suction cups to keep the filter secure.

Other filter brands use clips (but no cups) to hang on the rim of the tank, but these clips can vibrate and produce excess noise.

The size of this filter and its flow rate make it ideal for different types of tanks. The cascading waterfall created by the return design also works well in alternative tank setups. People have used this filter for paludariums, semi-submerged habitats, and for keeping reptiles and amphibians.

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Pros:

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• Large amount of water pumped per hour
• Great space for filter media in three stages
• Small and quiet for its filtration volume
• Cartridge maintenance is very easy

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Cons:

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• Smallest filter has very limited filter media
• Internal filters are difficult to disguise in the tank

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#3 - Fluval Underwater Filter

Fluval is one of the top manufacturers of filter and aquarium equipment on the market. Their units can be found in fish tanks all over the world.

Their U series, for underwater filter, is a great example of how they built their reputation as one of the best in the business. The new and improved U series is an evolution of their previous version of internal filters.

There have been significant improvements in the design. Here are a few ways they have taken a step forward:

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• The impeller can be accessed for cleaning and maintenance. While simple to maintain, impeller failure is the most common reason for filter failure.
• A new media insert area has been created inside the filter as well. This enhances the biological filtration ability of the filter.

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Another advance, small in size but huge in effect, is the redesign of the filter media chambers.

Most internal filters face a simple problem: they leak dirty water back into the tank during every media change or maintenance session. As soon as you switch off the filter and try to lift it, brown sludge leaks back into the tank.

Fluval has addressed this by changing the lower portions of its casing to solid plastic. This creates a small area at the bottom of the filter for the dirty water to gather rather than leak back into your tank.

The U Series has another trick up its sleeve: it can be flipped horizontally. This extra positioning allows it to function in many different environments. On its side, it is ideal for low-depth tanks such as reptile pools, amphibian habitats, and turtle tanks.

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Pros:

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• Suitable for larger aquariums
• Versatile positioning allows for supreme installation flexibility
• Top-opening lid makes maintenance easier
• Adjustable flow rate and output points increase the system’s capabilities

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Cons:

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• The price is higher than alternatives for the same size of filter

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#4 - MarineLand Magnum Polishing Internal Canister Filter

Many people with
large tanks (over 20 gallons) use canister or sump filters for all their
filtration. Many internal filters are simply not up to the task of providing
adequate filtration for big tanks.

Marineland’s Magnum Polishing Internal Canister Filter is an exception to this rule. This relatively compact unit provides three-stage filtration for tanks up to 90 gallons in size.

The best feature of the MarineLand Filter is its versatility. The unit comes with two different filter cartridges:

• One is designed for providing mechanical, biological, and chemical filtration. It accomplishes this by using a dual chamber canister covered by a filter floss sleeve. The two chambers can be filled with biological filter media and chemical filtration, such as activated carbon.
• The second cartridge is the polishing cartridge. This beauty contains MarineLand’s micron cartridge to capture tiny particles in the tank. Diatomaceous earth can also be used in this cartridge to really boost its cleaning abilities.

The Magnum is compact in size when its filtration rate is considered. Comparable canister or sump filters will be much larger. Strong suction cups and a sturdy bracket make installation simple.

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Pros:

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• Suitable for large fish tank
• Strong flow rate and filter output

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Cons:

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• Not suitable for small tanks due to high flow rate
• Flow rate is not adjustable

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#5 - Penn Plax Cascade 600 Submersible Aquarium Filter

Penn-Plax makes some very good aquarium equipment. Their Cascade series of filters are great examples of affordable, high-quality filters for many different fish tanks. The Cascade 600 is a great option for those wanting to boost their tank’s cleanliness without paying too much money.

One great feature of the Cascade 600 is its versatility. This is a fully submersible unit and can be placed vertically or horizontally in the tank.

• Horizontal placement makes it ideal for shallow pools such as turtle bays, reptile habitats, or even river ecospheres.
• Vertical placement is common in fish tanks.

An additional level of flexibility if added by the spray bar. You can position the spray bar to reduce water flow and direct it in the best way for their setup.

The Cascade also features an adjustable flow rate. Adjusting the flow while feeding is a common use of this feature. Those keeping slower fish, such as Bettas, will also appreciate having a quality filter that can produce low flow rates their fish will love.

Inside the filter, the theme of customization continues with the filter media design. A simple sponge filter serves as the first stage of filtration. After this, water passes into a filter media cup. This can be filled with whatever seems most suitable for the tank.

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Pros:

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• Adjustable flow rate
• Flexible installation options
• Fully customizable filtration media

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Cons:

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• Colored filter may be very visible in the tank
• Filter media area is not very large

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#6 - Marina I25 Internal Filter

Finding a quality filter for very small tanks can be a challenge. Many small tanks are sold with filters that are simply not very good. They move water, might contain a sponge or two, but are not really adequate for any proper setup.

Enter the Marina i25 Internal Filter. This compact unit is designed for small tanks.

It is engineered to provide the correct kind of filtration for tiny tanks without taking up all the available space.

The filter media design is the first great feature of this unit.

• Water is sucked into the center of the filter cartridge. The water contacts a zeolite chamber first in order to eliminate ammonia.
• After this, water moves into an activated carbon filter to clean chemicals and odors.
• A fine mesh filter traps small particles inside the filter so they do not return to the tank. Water returns to the tank via a waterfall at the top.

There is not an option for adjusting the flow rate. However, the filter can be moved so the water level is close to the waterfall output. This will reduce some of the turbulence created by the water output.

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Pros:

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• Small and compact
• Quiet in operation
• Very affordable
• Quality filtration for small tanks

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Cons:

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• No flow rate adjustment
• Must be installed vertically

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#7 - Elite Underwater Mini Filter

Like the Marina i25, this filter from Hagen is engineered for small aquariums. It is only suitable for tanks up to 3 gallons in size. For these micro tanks, however, it does a great job providing clean water for little fish.

One of the best features of this filter is its size. It is very small indeed. Being so small makes it ideal for use in nano tanks where real estate is precious. Plants, rocks, or other decorations can easily be positioned to hide this unit from view.

Inside the filter,
filtration is provided by a single chamber filled with a sponge. This provides
both mechanical filtration and biological filtration. For tanks less than 3
gallons, more filtration is probably not required. However, since the chamber
is open, extra elements could be added to increase its capabilities.

There is a flow rate adjustment feature. This is really useful for reducing the flow rate even further to suit fish that prefer slow-moving water.

Rounding out its features is an optional air tube. This is used to create a venturi effect and add air to the tank. Adding air via the filter is a bit of a tradeoff. The filter will create more noise. However, an additional air pump and air line will not be required.

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Pros:

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• Tiny in size
• Customizable filter media slot
• Adjustable flow rate

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Cons:

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• Venturi air line can be very loud
• Flow rate can be too high for some nano tanks, even when reduced

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Our Choices

Now, having shown you the features of
the top seven filters on the list, we want to tell you which ones we would
choose. We have two choices: the best filter and the most affordable filter.

The Best of The Best: Fluval Underwater Filter

The Fluval Underwater Filter is our choice
for the best internal filter available today. Its quality design, durability,
and high filtration level make it suitable for almost every tank.  Brilliant filtration quality and flexible
installation help this filter achieve spectacular results.

What we like most about this filter is its versatility. The different outputs allow you to design their perfect aquascape. The Fluval becomes a vital part of the system rather than just a black box to be hidden somehow.

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The Most Affordable: Whisper In-Tank
Filter with BioScrubber

Many people using internal filters are new to this exciting hobby. Budget concerns limit their choice of equipment. Happily, the Whisper In-Tank Filter is both cheap and effective. For a small price, the Tetra Whisper can clean tiny tanks very well. Replacement filter media inserts are cheap as well and can be found in loads of shops and online.

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Conclusion

These are our choices for the best internal filters on the market today. Like you, we are still learning about how to enhance our aquascapes to increase our enjoyment.

Have we missed any filters? Please write to us and let us know.

Read the original article at :
Which Internal Filter Is Best For Your Tank? (Top Picks and Reviews – 2020)

9 Aquarium Filter Types – Don’t Choose the Wrong One!

Everyone knows the important role
filtration systems play in maintaining attractive and healthy aquariums. Some
people successfully maintain their tanks without using filters. However, for
most people, owning a filter system will be a tremendous help in maintaining
water quality.

However, choosing a suitable filter
for aquariums as well as fish tanks is not a simple thing. There are dozens of types
of filters on the market. Each type usually has several competing brands and
styles. To make choosing more complicated, different accessories and extras are
included with some models and not others.

Today, I will introduce you to 9 common filter types, their features, and which type of aquarium they should be used for.

Let’s begin by learning about the roles and requirements for the filtration system in the aquarium.

The Role of Filtration in Fish Tanks and Aquariums

Everyone knows what a filter does, right? Dirty water goes in one side and clean water comes out the other. Simple!

Water filtration

The truth is a little more complicated. I want to help you
gain a deeper understanding of what happens in your filter. This knowledge will
help you choose the best filter for your tank.

Filter water through filter media

Filters move water through the stuff inside of them. This stuff is called ‘filter media’. There are different kinds of media available. Common varieties include sponges, floss, activated charcoal, filter pads, and more. These all do slightly different things.

However, there are three basic distinctions:

1. Mechanical filtration is achieved by filter media that trap physical particles for removal from the tank. An example is when dirt gets caught in a sponge and then removed from the tank when the sponge is changed or cleaned.
2. Chemical filtration is done by media such as activated charcoal or purigen. Harmful chemicals and odors bind to the filter pads and are neutralized.
3. Biological filtration occurs when water flows over filter media that is covered in bacteria. Bacteria convert poisonous ammonia to harmful nitrite. Nitrite is converted by other bacteria to nitrate, which is less harmful.

These three kinds of filtration are the most common. Good
filters achieve all three in a single unit.

Create Flow in the Tank

Water flow in aquarium

Water should be moving in most tanks. Specialist tanks can be created without pumps or filters, but these are commonly set up for special fish breeds or advanced fish keepers.

Everyone else uses filters to create water flow in their tanks. Water flow is essential for moving nutrients around the tank, preventing chemical build-up in still water, and helping fish stay healthy by making them swim.

Now we’ve covered the basics of filter system requirements.
Let’s take a quick tour of the different filters and filtration systems
available today.

9 Main Filter Types

#1 - HOB Filter

A Hang-On-Back (HOB) Filter is what it sounds like: a filter that hangs on the back of your tank.

HOB Filter

These are great for smaller tanks because they come in smaller sizes. Their lower flow rates are suitable for smaller tanks where high flow rate would damage the plants or fish.

Many of the best models come with three or four types of filter media. Some even have extras such as UV sterilizers.

Pros:

Here are some advantages of HOB filters:

• Suitable for freshwater and saltwater tanks
• One of the easiest filters to clean and maintain
• Very adjustable to suit different tank needs
• Cheap to buy and test

Cons:

These filters can have some drawbacks as well. Here are a few:

• Can be noisy compared to canister filters or
  internal filters
• Filter media needs regular maintenance and
  replacement

HOB filters are incredibly common in the aquarium industry. Their frequent use has led to many great designs and upgrades. Major manufacturers such as Fluval and Eheim can be found worldwide. Widespread availability of replacement parts and filter media make maintenance a little less problematic.

#2 - Sponge filter

Sponge filters are some of the simplest, cheapest filters on the market. Just like HOB filters, the name is its own description. Sponge filters are simply sponges placed over the intake of a water pump.

Sponge filter

They can be very large, small, coarse, fine, or even stacked together to create a more complex system.

There are a few different uses for sponge filters.

• First, they are great for providing gentle
  filtration necessary for some aquatic animals. Shrimp and Betta fish are great
  examples of animals needing gentler flow.
• Sponges are also great for filtering water in
  hospital tanks or special breeder tanks where gentle flow is a must.
• Finally, sponges can act as pre-filters for
  other filters.

Pros:

Sponge filters have some advantages over other kinds of filters.

• To begin with, they are incredibly simple and cheap to purchase and run.
• Second, maintenance is very easy. Simply keep some of the water from the weekly water change and use it to clean the sponge.
• Finally, sponge filters can be set up in an almost endless variety of configurations.

Cons:

However, there are some disadvantages to sponge filters.

• The most important is the lower amount of filtration media. Sponge filters, while effective, are simply smaller and use less media than an HOB filter, internal filter, or canister filter.
• The second major issue is their size and appearance. Sponge filters are in the tank, so they are highly visible. Careful planting and arrangement can conceal them, though.

#3 - Internal Filter

Internal filter

Most people just beginning to keep fish have seen an
internal filter. These black pumps with sponge boxes attached are common
accessories to small tanks and starter kits. Companies sell them as adequate
filtration systems for smaller tanks.

To be fair, an internal filter can do a great job filtering
the water for some tank setups. For example, a glass tank with gravel, ornaments,
fake plants, and a few fish might be great for an internal filter. The
filtration needs of this tank are probably not going to be very complex.

Pros:

These filters have a few good points, such as:

• They are cheap to buy and run
• Most of them are very quiet because the water
  muffles any sound
• Many of them have adjustable flow rates and
  nozzles for improving performance

Cons:

Internal filters can be undesirable for several reasons, though. Here’s a little list:

• The filter is going to be very visible and
  difficult to hide
• A spray bar may be necessary to control the flow
  rate for larger tanks
• The filtration quality is limited by the number
  of filter media spaces, which is usually only one or two sponge boxes

Small, uncomplicated tanks might be fine with an internal filter.

Saltwater tanks are almost always bigger than an internal filter can cope with, so these are usually freshwater filters.

#4 - Canister Filter

Canister filters are the workhorses of the intermediate and advanced aquarium hobby. These are brilliant for tanks larger than 10 gallons. They are used successfully on tanks up to 400 gallons in size.

Canister filter

There are a few big brands on the market as well as some lesser-known brands offering bargains for those willing to do their research.

Pros:

Canister filters have some huge advantages:

• Their filtration quality is excellent due to
  large filter media capacity and powerful pumps
• Owners normally hide them away below the tank,
  so they are not easily visible
• Maintenance is easy in concept – just open the
  canister and clean everything

Cons:

These advantages come with some problems:

• Canister filters are more costly than other
  types of filters
• Maintenance is more complicated due to the need
  to shut off the pump and manage water flow from the tank

Canister filters work for both saltwater and freshwater
tanks. Their high output makes them ideal for larger tanks or tanks with a
higher bio load of fish and animals.

#5 - Surface Skimmer

Surface skimmers add a useful capability to a filtration system. They collect debris and oil buildup on the surface of the water and pass it through a filter media pad, usually a sponge or floss arrangement.

Skimming the surface of the tank this way reduces the amount of junk floating in the tank. Doing so then reduces algae growth and promotes better gas exchange at the surface.

Surface skimmers are beneficial in a few ways:

• They are usually attractive and don’t detract
  from the beauty of the tank
• Surface oil, debris, and even algae are common
  problems resolved by a surface skimmer
• Most models are small and easily adaptable for
  small tanks

Of course, there are a few things to consider:

• Surface skimmers tend to be fragile, delicate
  setups and may require adjustment to function properly
• They are not a complete filtration system and
  usually require a canister filter’s assistance

I am happy to recommend a
couple of these to you.

If you have a small tank, then please consider installing the JARDLI Glass Lily Pipe Inflow with Surface Skimmer for aquarium planted tanks.

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This gorgeous unit comes with glass ‘Lily Pipes’ that add beauty and flair to your filtration system. It does need a separate filter or pump to drive the water so this is really an addition to your filtration system rather than a replacement.

If you have a larger tank, then you can use the Odyssea Clean 100 Surface Skimmer.

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The Odyssea skimmer works for tanks up to about 60 gallons in size. Its pump moves much more water – up to 110 gallons per hour. This should improve your water circulation as well as provide excellent surface cleaning. However, the powerful pump also uses more energy and takes up more space.

Surface skimmers are great
for both freshwater and marine tanks. Both kinds of water will benefit from the
extra level of cleaning provided by skimmers.

#6 - Sump Filter

Go big or go home! Some fish keepers seem to make this their
motto. Their tanks are massive, their fish are huge, and their filtration
systems are impressive. For those interested in truly huge tanks, a sump filter
is probably the best option.

Sump filters are extra tanks that function as large filters.
They usually sit somewhere under the main tank or behind the tank where they
can be hidden from sight.

Sump filter

Sumps are built with several different chambers. Chambers
are created by adding glass or acrylic walls inside the spare tank. Different
filter media is placed in each chamber. Water is then pumped from the main tank
into one end of the sump. The pump pulls clean, filtered water from the other
end of the sump and returns it to the tank.

Sumps work very well with both freshwater and marine tanks.
The individual components of the sump’s chambers will vary according to the
type of filtration needed by each specific tank.

Sumps have some really great features:

• They are totally customizable and can be
  designed for almost every conceivable tank setup, including both freshwater and
  saltwater aquariums.
• Sumps provide an extra volume of water to help
  stabilize the water parameters in the main tank.
• Sumps can also be connected to multiple tanks to
  provide filtration for a multi-tank room.
• Extra equipment, such as heaters and UV
  sterilizers, can be hidden away in the sump.

All these benefits come at a cost. Some of the downsides of
a sump are:

• Sumps require a large amount of physical space –
  this is a second fish tank.
• Sump pump failure can result in overflow and
  mess problems.
• Initial build costs can be much higher than a
  canister filter.

Despite their downsides, the sump filter is the best choice for anyone installing their dream 300-gallon fish tank/aquarium. I can even recommend a kit for you. Have a look at the Fiji Cube Refugium Sump Baffle Kit.

Fiji Cube Refugium Sump Baffle Kit

[su_button url="https://www.amazon.com/Fiji-Cube-Refugium-Baffle-Breeder/dp/B074T693K4/ref=as_li_ss_tl?keywords=sump+filter&qid=1579106075&rnid=2941120011&s=pet-supplies&sr=1-2&th=1&linkCode=ll1&tag=ap250e-20&linkId=b1dd92c003746177f97864b5bfc9fdfe&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

This kit contains everything you need to convert a common 40-gallon tank to a sump filter. The same company sells different sizes if you are working on a slightly different budget or project.

#7 - Under Gravel Filter

Under gravel filters are not as popular as they once were.
Their popularity has waned due to changes in substrate preference. These
filters are exactly what their name implies: great filters for gravel.

Under gravel filters work by drawing water down through the tank’s gravel bed and into the filter itself.

Under gravel filter

The filter sits below the gravel and is made of one, two, or more plates. Each plate has many tiny holes in it to facilitate water movement. The gravel rests on top of the plates and water passes between the rocks to move through the filter below.

Under gravel filters will work in both freshwater and saltwater tanks. However, they require a loose gravel substrate.

Many aquarium tanks use sand as a substrate. Sand is incompatible with an under gravel filter because the sand grains trickle through the filter and clog it. Sand also forms a more solid mass that blocks water passing through to reach the filter.

Filtration designed this way has a huge advantage. The gravel in your tank has a very high surface area for bacterial growth. Think of all those little rocks! Bacteria can grow on every side of every rock. As the powerhead or air stone pushes water through the filter and up the riser tubes, dirty water is drawn down into the gravel. Doing this means the water mixes with all the bacteria in the gravel. This is an excellent biological filter design.

Under gravel filters have some problems, though. The chief issue is circulation. A powerhead or air pump with insufficient power will not move water through every area of the filter. The areas of uncirculated water will become dead zones where harmful bacteria grow. While this can be solved by using a sufficiently powerful pump, these dead zones are a common cause for concern.

I am happy to show you a modern under gravel filter that should work well for anything up to a 50-gallon tank. Please look at the Penn Plax Premium Under Gravel Filter System.

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The Penn Plax system comes with multiple plates. Each plate can be cut and shaped to fit fish tanks of different dimensions and footprints. If you’re setting up a simple tank with gravel substrate, this is a great choice for you.

#8 - Wet/dry filter

Wet/dry filter

Wet/dry filters are a little confusing to some people. They are, essentially, an addition to a sump system. Their main purpose is to add an extra space for intense biological filtration in a highly aerobic environment. Maybe that’s a lot to take in for one sentence. Here’s how they work:

• Water is pumped from the display/main tank into
  the top of a wet/dry filter tower.
• A pre-filter, usually a sponge, removes some
  debris from the water.
• The water passes onto a drip plate. This is a
  flat plate with many small holes drilled in it.
• Water falls through the holes and picks up lots
  of oxygen as it moves through the air.
• The falling water lands on biological filtration
  media where bacteria can begin the ammonia breakdown cycle.
• At the bottom of the biological filter, the
  water moves into another chamber for extra filtration. Eventually, the water is
  passed back into the main tank.

Pros:

As you can see, wet/dry filters are additional chambers in a
sump system. Because of this, they have some advantages:

• They can provide biological filtration for very
  large volumes of water. These are the filters for the massive tanks.
• Extra biological filtration can increase the
  fish capacity of the main tank.

Cons:

They also have some disadvantages. Primarily, they are bulky
and can be noisy. The extra vertical space needed to add a tower to a sump
filter might make fitting the sump under the main tank difficult.

One note about these filters is their use in saltwater
systems. There is some debate in the reef tank community about the usefulness
of these filters. Primarily, the biggest filtration difference between a
freshwater tank and a saltwater tank is the presence of live rocks and coral in
the marine tank. These provide all the biological filtration necessary for most
tanks.

Recommended Product:

I can show you one good kit to get you started with your wet/dry filter. Here is the Pro Clear Aquatic Systems Premier Wet/Dry Filter.

[su_button url="https://www.amazon.com/ProClear-Aquatics-Premier-Filter-Prefilter/dp/B00061UXIC/ref=as_li_ss_tl?keywords=wet+dry+filters&qid=1579105746&s=pet-supplies&sr=1-1&th=1&linkCode=ll1&tag=ap250e-20&linkId=350101d246816a5cb912870fc7e4f06b&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

It comes with all the gear you need to get up and running (except the pump itself). There is a spray bar, return and siphon hoses, a polishing block, bio balls, and plenty of tubing.

If a large tank is your goal, then this may help you create a clean, fresh, beautiful tank for your fish.

#9 - Protein Skimmer

Our final piece of filtration equipment is another addition to a filter setup. Protein skimmers are used extensively in reef tanks to remove unwanted organic waste from the water.

Coralife Super Protein Skimmer with Pump

They work by agitating the water and injecting many micro-bubbles into the water. Through a wonderfully complex process, waste tends to bind to these bubbles. The bubbles carry the waste back to the skimmer where it can be collected and disposed of.

Another name for these devices is ‘foam fractionators’. They do work by creating foam and fracturing the water. Sounds neat, eh?

Protein skimmers are more complex and powerful than their
cousins, the Surface Skimmers. Protein skimmers are most useful when they are
installed in a sump for a marine tank. There, the most powerful protein
skimmers can get to work cleaning the water.

Pros:

The advantage of a protein skimmer is the efficient way it cleans waste from water. These are probably essential equipment for advanced marine tanks with difficult coral.

Cons:

The big disadvantage of a protein skimmer is its price. A
good model, designed to go in a sump filter, could sell for several hundred
dollars. While this isn’t a big expense considering the budget of many 200+
gallon marine tanks, it is still a considerable sum of money.

Final Thoughts

I’ve tried to show you all the aquarium filter types and
systems on the market. Some have probably been missed off my list of fish tank
filters. Are you using some equipment I missed? Send me a message and let me
know about it.

Read the original article at :
9 Aquarium Filter Types – Don’t Choose the Wrong One!

7 Best Canister Filters – The Complete/Ultimate Comparison [2020 Update]

Everyone knows great filtration is a must for healthy fish and beautiful tanks. Anyone who has looked into the aquarium filter market also knows how many choices, options, and possibilities are available.

We’re here to help reinforce your choice of a canister filter for your tank. We’ll also show you the best aquarium canister filters available today.

Let’s get started by looking at the main considerations for
shoppers.

A/ Things to Consider When Choosing a Canister Filter

All canister filters have two main functions:

• Move the correct amount of water through the filter.
• Clean the water thoroughly using mechanical, biological, and chemical methods.

These are the main ideas to keep in mind when you are searching for the best filter.

• Considering your tank setup, you should choose a filter that moves enough water.
• Then you should consider the quality of filtration being provided within the canister filter.

To help you, we’re going to explore these two features in depth. Then we’ll show you a quick comparison table. Afterwards, you’ll have everything you need to know in order to make a brilliant choice for your next filter.

#1 - Tank Capacity and Filter Flow Rate

The first, and most important, thing to consider when choosing any filter for any tank is the filtration flow rate requirement.

You should already know your tank’s size in gallons (or liters). Every filter comes with a manufacturer’s specifications. The spec will tell you how many gallons of water the filter will pump per hour. Seems simple, right?

The Research

Yes and no. To be clear, there is
no direct evidence requiring a certain amount of filtration. You can see this article
from the International Journal of Recirculating Aquaculture for a lot more
detail. Their conclusion is a water exchange once per hour is probably enough
for fish health.

On the other hand, hobby fish tanks are different systems than large fish farm systems. A beginner’s guide recommends 3-5 water exchanges per hour. This means your filter should pump at least three times the amount of water in your tank every hour.

Thus, if you have a 25-gallon tank,
then your filter should move at least 75 gallons per hour. It would be better
to move 125 gallons per hour.

The Goal

You should aim for a sweet spot
between too much water movement and too little filtration. Here’s why:

• If your filter is moving too much water, then you can harm your fish, shrimp, and plants. The increased flow rate may require fish to swim actively too often. Increased exercise may stress the fish and lead to health problems. Plants may have tissue damage from being moved in the current too forcibly. This is especially true of stem plants with large leaves.
• If your filter is not moving enough water, then you can have different problems. Your tank is – probably – rectangular. If your filter isn’t moving enough water, then the corners of your tank can become breeding grounds for ammonia-producing bacteria. A low flow rate may also be ineffective at sweeping organic matter into the filter where you can remove it.

If you can hit this sweet spot,
then your fish and plants will thank you.

#2 - Filtration System

Every filter is designed with a filtration pathway for your
water. The water enters the filter through the hose and passes through several
sets of filter media. These can include sponges, filter floss, activated
charcoal, UV sterilizers, and water polishing pads.

Choose a filter that can be set up to match your needs. All
our filter choices can be customized to some extent. Here are a couple of
examples of choices you can make:

• Extra dirty fish, such as a goldfish or predatory fish, will produce more solid waste. A filter with extra space for mechanical media (sponges and floss) will help keep this tank clean.
• A tank without plants may produce more algae because of lower competition for nutrients. A UV sterilizer can help to combat sudden algae blooms.

Plan your filter setup to maximize the filter’s efficiency
for your tank. You will be rewarded with clear water and happy fish.

#3 - Other Helpful Features

The features we’ve just mentioned are standard for all canister filters. Clever engineering and planning have created few extra features. These are found on some models and not others.

Let's take a look and see which one you like best.

Self-Priming Function

Canister filters do not sit inside the tank. This means they
are not installed with water inside the filter. The pump must be primed with
water to begin operation, so it does not run dry and burn itself up.

Some canister filters offer a self-priming or an
easy-priming function. A button or small slide accomplishes this task. We
recommend you choose a filter with this self-priming function to make setup and
maintenance much easier.

Adjustable Flow Rate

Adjusting the flow rate of your filter is useful for at
least two different reasons:

1. Reducing the flow during feeding times may help
   food remain on the surface or in the correct place in the water column. It may
   also help your fish catch their food if they are slow, such as ornamental
   goldfish.
2. Your filter may move too much water. Turning
   down the flow rate can help you customize your filter to your tank.

UV Light

A UV light works by sterilizing the water as it passes in
front of the UV bulb. This should kill bacteria and other micro-organisms.

Some canister filters have UV sterilizers built into them.
The UV sterilizers are placed in the filtration process after the water has
circulated past the other filters.

While this may seem an optional extra to some people, it
will result in a cleaner tank and may help combat algae blooms or bacteria
spikes.

Spray Bars

The water being returned to your tank will be moving at a
high velocity. Spray bars, or spreader bars, split this water into multiple
smaller streams. This reduces the force of water movement in your tank.

Depending on your fish and plants, the return from your filter may be too strong. If this is true, then you will need a spray bar.

If your chosen filter doesn’t come with its own bar, then plan to buy one before you install the filter.

#4 - Additional Considerations

All the above features make canister filters a great choice
for larger tanks. We should point out a few more things to help you make a wise
choice.

Customer Reviews

In the world of eBay, Amazon, and Shopify, customer reviews
are taking on more and more significance. As you do your research, you can look
for common issues mentioned in reviews.

Some filters may not be a good match for every tank setup,
though. You should read reviews but not necessarily heed everything someone
else has said on the internet.

Warranty

Everyone hates returning stuff. What everyone hates more is when something breaks just after the warranty has expired.

Help your future self by looking for products with a long warranty period. This usually means the manufacturer stands behind their product’s build quality.

Price

The only way to compare prices is to look at the main feature of filters. There is a large price difference between the less expensive models and the most expensive models.

Some brands can sell for two or three times the price of others. With identical features and functions, you must make your own value choice.

B/ The Seven Best Aquarium Canister Filters

Now we’re going to show you our choices for the seven best canister filters on the market today. We’ll begin with a handy comparison table.

After that, we’ll break down the pros and cons of each unit. Once we’re done, we’ll tell you which we think is best.

[INSERT TABLE HERE]

#1 - Penn-Plax Aquarium Cascade

Penn-Plax has been producing pet
supplies for more than 60 years. What began as a pet shop in Brooklyn has
become a global supplier of equipment for all kinds of pets. The Penn-Plax
aquarium range has some very good filters, decorations, and equipment you
should consider.

[su_button url="https://www.amazon.com/Cascade-CCF3UL-Canister-Filter-Gallon/dp/B0002DJ9NY/ref=as_li_ss_tl?ie=UTF8&linkCode=ll1&tag=ap250e-20&linkId=29ef8153d7eb3bfb539f61ac4c03c1ae&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

Specifically, the Penn-Plax Cascade
1000 is a great value filter for aquariums up to 100 gallons. This compact unit
moves up to 265 gallons of water per hour through its three media baskets. It
will pump 100 gallons of water in about 23 minutes. Your water should be
sparkling clean and fresh.

The valves on the Cascade are a real advantage. Each one rotates through 360°. You should be able to set this filter up in even the tightest aquarium cabinets because the tubes can be turned in any direction to suit the space. In addition to their rotation, the valves are also engineered with shut-off controls which also serve as flow adjusters.

The media baskets are large enough
to accommodate any type of filter media. Customizing your filtration to meet
your tank’s needs is easy to accomplish. Filter media is shipped with the
filter but may need to be replaced with something suitable for your tank.

All these advantages come at a very
low price. Four other filters cost more than this sleek beauty.

There are some disadvantages you
can think through. The media baskets are not always the easiest to install. The
filter media included with the filter is also a bit limited. You may want to
add better media to the filter yourself. Also, there is a 3-year warranty
available. However, customer service in countries other than America can be
limited to dealing with the retailer.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Great price
• Easy setup and maintenance
• Useful, high-quality valves
• Priming button works well

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Limited customer service outside the USA
• Filter media is limited

[/su_list]

[su_button url="https://www.amazon.com/Cascade-CCF3UL-Canister-Filter-Gallon/dp/B0002DJ9NY/ref=as_li_ss_tl?ie=UTF8&linkCode=ll1&tag=ap250e-20&linkId=29ef8153d7eb3bfb539f61ac4c03c1ae&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

#2 - Fluval External Filter

Fluval
is another top brand in the hobby aquarium market. Their filters and
accessories are sold all over the world and trusted by hundreds of thousands of
happy customers. Fluval’s products are renowned for their reliability and high
build quality.

[su_button url="https://www.amazon.com/Fluval-A212-306-External-Filter/dp/B005QRDDWY/ref=as_li_ss_tl?s=pet-supplies&ie=UTF8&qid=1525267304&sr=1-7&refinements=p_36:4000-99999999&linkCode=ll1&tag=ap250e-20&linkId=ed09e2b4ac7372b1df05b8ef695f4444&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

Fluval’s
series of canister filters ranges from the 106 to the 406. The 106 pumps 145
gallons per hour while the 406 moves 383 gallons per hour.

For a 100-gallon tank, the 406 would be ideal. It can pump 100 gallons of water in only 15 minutes. This high level of filtration is essential for clear, fresh water and will lead to healthier fish.

Inside the filter, Fluval has engineered its new series to use better motors and impellers. They estimate their motor’s performance has increased its flow rate and head pressure. The impeller is also between 8-16% quieter than previous generations. They have re-engineered the impeller cover to increase its durability.

Maintaining the filter is easier than ever due to several new advances.

• First, the patented Aqua-Stop valves make disconnecting the hoses less troublesome and leaks less likely.
• Second, the lift-lock clamps operate with a single motion to make access easier as well as a more secure seal. Hose lock nuts increase the security and sealing even more.

The filtration pathway has been designed to keep the water inside the filter for as long as possible. Water moves through several filter media baskets before being pushed back into the tank. Many users describe their Fluval filters in glowing terms and report brilliant water quality after using them.

The big downside to the Fluval filter is its price. It is tied for the most expensive filter on our list. The price does come with a 3-year warranty, though.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Very high filtration rate
• Superb build quality
• Excellent design of water path through filter
• Good clamping system

[/su_list]

Cons:

[su_list icon="icon: close" icon_color="#FF4500"]

• High price

[/su_list]

[su_button url="https://www.amazon.com/Fluval-A212-306-External-Filter/dp/B005QRDDWY/ref=as_li_ss_tl?s=pet-supplies&ie=UTF8&qid=1525267304&sr=1-7&refinements=p_36:4000-99999999&linkCode=ll1&tag=ap250e-20&linkId=ed09e2b4ac7372b1df05b8ef695f4444&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

#3 - EHEIM Classic External Canister Filter

German machining is praised around the world for its accuracy and quality. This filter from EHEIM is no exception to this rule. The build quality is very good, and the design is intelligent and thoughtful.

The filter we suggest, for this review, is the EHEIM Classic 350. The 350 is designed for tanks up to 100 gallons. Smaller versions are available for smaller tanks.

[su_button url="https://www.amazon.com/Fluval-A212-306-External-Filter/dp/B005QRDDWY/ref=as_li_ss_tl?s=pet-supplies&ie=UTF8&qid=1525267304&sr=1-7&refinements=p_36:4000-99999999&linkCode=ll1&tag=ap250e-20&linkId=ed09e2b4ac7372b1df05b8ef695f4444&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

EHEIM’s units come a striking green color. Filtration is achieved in a single canister of filter media rather than in separate trays. However, there is plenty of space for different kinds of filter media.

EHEIM sends its units out with all the necessary filter media. There is an activated carbon pad, as well as a coarse and fine filter sponge pad.

The
motor and impeller are the latest in a long line of great products from EHEIM.
The design tolerances are very good, and users report quiet running for months.

However,
there are some things you might want to consider. First, and most importantly,
the flow rate is much lower than competitors. The advertised flow rate is only
136 gallons per hour. This is less than half the specified rate of the Fluval
canister filter. Second, the price is high for such a small flow rate.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Lots of filter media included
• Good color of unit
• Great build quality
• Very quiet operation

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• No self-priming function
• Very short warranty

[/su_list]

[su_button url="https://www.amazon.com/Fluval-A212-306-External-Filter/dp/B005QRDDWY/ref=as_li_ss_tl?s=pet-supplies&ie=UTF8&qid=1525267304&sr=1-7&refinements=p_36:4000-99999999&linkCode=ll1&tag=ap250e-20&linkId=ed09e2b4ac7372b1df05b8ef695f4444&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

#4 - Aquatop CF Series Canister Filter

Aquatop’s CF Series is the first filter in our list with a big change in capability. This little beauty comes equipped with a UV Filter for extra cleaning power.

[su_button url="https://www.amazon.com/dp/B004GIXCI4/ref=as_li_ss_tl?&linkCode=ll1&tag=ap250e-20&linkId=bb680e32be6c2827015c292909d2cde1&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

UV sterilizers work for your aquarium by sterilizing the water after it has passed through the other filter stages. The light wavelengths emitted by UV lights kill microorganisms such as bacteria and algae. Given enough time, they will even kill larger little beasties such as protozoa.

Apart from the UV sterilizer, this
canister filter is built well. The pump has a self-priming feature. This means
you don’t need to siphon water down to the filter before using it.

There are three stages of
filtration prior to the UV sterilizer. These are coarse and fine sponges, and
then a space for biological filtration of your choice.

The CF series of filters allows for
different tank sizes. The smallest filter moves 264 gallons per hour while the
largest, the CF500, moves up to 525 gallons per hour. In the middle is the
CF400, which moves 370 gallons per hour. For a 100-gallon tank, the CF400 is
the best choice.

Knowing the correct size reveals
one of the disadvantages of this filter – its price. It’s 50% more expensive
than other filters such as the Penn-Plax Cascade. The Aquatop also has the
lowest customer review score on Amazon at the present time. While every filter
doesn’t work for every person or tank, the high number of low reviews might be
enough to make you look elsewhere.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• UV sterilizer included
• Self-priming pump
• Good filtration design

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Poor customer reviews
• Pricier than other, similar filters

[/su_list]

[su_button url="https://www.amazon.com/dp/B004GIXCI4/ref=as_li_ss_tl?&linkCode=ll1&tag=ap250e-20&linkId=bb680e32be6c2827015c292909d2cde1&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

#5 - Marineland Magniflow Canister Filter

The fifth canister filter on our list comes from MarineLand. The Magniflow canister is a great entry in the budget category. It has some simple features that should make maintenance easy.

[su_button url="https://www.amazon.com/dp/B010PLGH4G/ref=as_li_ss_tl?ie=UTF8&linkCode=ll1&tag=ap250e-20&linkId=da664cdb25dc682811a0124e47bcaccd&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

To begin with, the valves come with a very simple valve stop system. An easy lift of the red lever disconnects the valves. Water stops flowing and this helps prevent leaks from ruining your maintenance routine.

In addition to this, the whole unit seals with a simple push motion. This isn’t as complicated as the locks and levers on other units. Fewer moving parts means less opportunity for breakdowns.

A quick prime button finishes the
maintenance features with an easy way to restart the filter after it has been
cleaned and serviced.

Water passes through four
filtration stages. First is a simple mechanical stage consisting of sponges and
pads. The second and third stages are chemical and biological filtration with
activated carbon and bio balls, respectively. Finally, a water polishing pad
adds sparkle to the water before it returns to the tank.

There are a couple of reasons you
might consider a different filter. The first is the quality of the seal when
the unit is closed. Some users report micro-bubbles in their water due to an
incomplete seal. Second, the hose connections are a little prone to loosening
over time. This doesn’t lead to complete unit failure but can be a pain in the
neck to resolve.

One final note: almost all customer
reviews mention Marineland’s excellent customer service.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Great valve stop system for leak prevention
• Four filtration stages
• Great customer service
• Quick priming button

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Inconsistent seal could lead to micro bubbles
• Hose connections may loosen over time

[/su_list]

[su_button url="https://www.amazon.com/dp/B010PLGH4G/ref=as_li_ss_tl?ie=UTF8&linkCode=ll1&tag=ap250e-20&linkId=da664cdb25dc682811a0124e47bcaccd&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

#6 - Hydor Professional External Canister Filter

Most people hide their canister filters in a cabinet. The Hydor Professional Canister Filter is an exception to this idea. Its sleek, black exterior is a great complement to many tanks and their décor. The performance is also very good. Let’s have a look at some of its good features.

[su_button url="https://www.amazon.com/dp/B00D5WHC8S/ref=as_li_ss_tl?&linkCode=ll1&tag=ap250e-20&linkId=7d72035d2dace9e33bf3f83c2b97d678&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

To begin with, its design comes
with five filter media trays. This allows the user to customize the filtration
for their tank setup. For example, some fish are super dirty. An extra tray
dedicated to sponges will help these fish. Other trays allow for ample
biological media to be utilized.

The Hydor canister filter also
comes with a simple priming mechanism. Maintenance should be a little easier
with this feature. The hose valves also come with adjustable levers and so
shutting off the water flow during feeding or cleaning should be simple.

However, these features are
accompanied by a few problems. The first is the lack of anything truly special.
The second is its price. This filter is tied for the most expensive filter on
our list. Price isn’t the problem. Lack of performance for the price is the
issue.

The motor, impeller, and filtration
system aren’t anything innovative or unique. For the price, the Fluval filter
will probably provide superior performance.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Extra filter media trays allow great customization
• Attractive exterior design
• Simple, effective priming mechanism

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Very expensive but not unique
• No clear quality advantage

[/su_list]

#7 - Polar Aurora External Aquarium Filter

Our final canister filter is also one of the cheapest. The Polar Aurora filter is packaged nicely, features an attractive exterior, and has some very useful features.

[su_button url="https://www.amazon.com/Polar-Aurora-External-Aquarium-Canister/dp/B00JYEFFEO/ref=as_li_ss_tl?keywords=canister+filter&qid=1578056794&sr=8-7&linkCode=ll1&tag=ap250e-20&linkId=99720a8b76af6469eec1372317cc84a8&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

To begin with, this is one of only two canister filters to feature a built-in UV sterilizer. The sterilizer isn’t incorporated into all models, so be sure you know what you are buying. However, the inclusion of this extra sterilization should reduce algae growth in your tank as well as reduce levels of unhelpful bacteria.

The motor and impeller work together to move around 370 gallons of water per hour. This is enough to pump 100 gallons of water every 16 minutes.

To
assist with maintenance, the hose joints swivel through 360°. A shut-off lever
helps reduce leaks. The whole unit closes with one large locking lever. All
these features should assist the regular cleaning and servicing of the unit.

Some
users report difficulty in setting up this filter. Finding and eliminating
excess air in the system can be a challenge.

However,
this filter has two great points. First is its price. Second, this filter has
the smallest percentage of negative reviews on Amazon. This means many people
have had good experiences with this unit.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• UV sterilizer included in some models
• Good flow rate for its price
• Swivel hose joints make installation and maintenance easier
• Good customer reviews

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Eliminating air in the system can be challenging

[/su_list]

[su_button url="https://www.amazon.com/Polar-Aurora-External-Aquarium-Canister/dp/B00JYEFFEO/ref=as_li_ss_tl?keywords=canister+filter&qid=1578056794&sr=8-7&linkCode=ll1&tag=ap250e-20&linkId=99720a8b76af6469eec1372317cc84a8&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check the price on Amazon.com[/su_button]

C/
Our Choice

Having reviewed all these units, our choice is easy: the Fluval is the best filter on the market today. Its excellent flow rate and cleverly designed filtration path give it superior performance.

The price might be a little high, but this comes with a 3-year warranty and excellent build quality. Purchasing replacement supplies is also easy in just about every major market.

Do you want to buy the Fluval canister filter?

[su_button url="https://www.amazon.com/Fluval-A212-306-External-Filter/dp/B005QRDDWY/ref=as_li_ss_tl?s=pet-supplies&ie=UTF8&qid=1525267304&sr=1-7&refinements=p_36:4000-99999999&th=1&linkCode=ll1&tag=ap250e-20&linkId=b13e3ad0e4ce074dddd4d7964acda1db&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Yes, I want to order it now! [/su_button]

Honorable Mention

The Fluval series filters are great units. However, if they are outside your operating budget, then the Penn-Plax Cascade is our choice for low-cost setups. Its performance is great, and its price will not punish your bank balance.

Do you want to buy the Penn-Plax Cascade canister filter?

[su_button url="https://www.amazon.com/Cascade-CCF3UL-Canister-Filter-Gallon/dp/B0002DJ9NY/ref=as_li_ss_tl?ie=UTF8&linkCode=ll1&tag=ap250e-20&linkId=492b6c87f8a8bd497aa2f62193fc4c60&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Yes, I want to order it now! [/su_button]

What Do You Think?

These are our choices for the best aquarium canister filters
on the market. We even narrowed the field down to one clear winner. What do you
think? Please let us know about your experiences with canister filters.

Read the original article at :
7 Best Canister Filters – The Complete/Ultimate Comparison [2020 Update]

5 Best HOB Filters – A Complete Review & Comparison Guide (in 2019)

No one wants a cloudy fish tank or
sick fish. Instead, all of us fish keepers want a brilliant, sparkling tank. We
want healthy fish so we can enjoy watching them. Great filtration is one of the
most important parts of making an attractive tank that keeps your fish hale and
hearty.

In this article, we’re going to show you the basics of a good filter setup. Then we’ll give you five great choices for buying a filter for your tank. We’ve included a helpful chart to give you a side-by-side comparison of all five filters.

After we announce our top choice, we’ll answer a few of the common questions people have about Hang on Back Filters.

Buyer’s guide to Hang on Back filters

Hang on back filters are known as HOB filters or power
filters. Many people choose these instead of in-tank filters because they are
easier to maintain. They also stay out of sight behind the tank. Together, this
makes your tank more attractive and less work.

However, filters are like fish. There are dozens of
different varieties. They are described in various ways. The language can get a
bit confusing. We’re here to help you with our simple buyer’s guide.

Here are the top six
things we think you can think about to help make the best choice.

#1: Filtration Flow Rate and
Tank Size

Flow rate is very important for tank health.

If your flow rate is too low, then waste will build up in the poorly filtered tank.

Too much filtration could lead to a fast water flow. This can harm small shrimp and placid fish, such as Bettas.

Filtration flow rate is measured in gallons per hour (or liters per hour for those outside the USA). The HOB filter which will work best for your tank will move at least four times the volume of your tank each hour.

For example, if you have a 20-gallon tank, then your filter should move at least 80 gallons of water each hour.

The manufacturer specs are always optimal or maximum. The amount of water being moved may change. Some filters are adjustable.

All filters will have reduced flow rate due to dirt and particles. So it’s better to choose a filter that moves 4-5 times the volume of your tank to be sure your filtration is good enough.

#2: Filtration quality

Filtration quality is hotly debated. Filter manufacturers
all make grand claims about their products. Some of these claims are even true!
We want to provide you with some simple guidelines for choosing the best
filter.

There are two designs of HOB filters to think about.

[su_list icon="icon: pencil" icon_color="#000008"]

• The first is a chamber filter. These are designed to use filter media, such as sponges and filter floss, inserted into the chamber.
• The second type is a cartridge filter. Cartridge filters are built to use the manufacturer’s cartridges.

[/su_list]

Which of these is better for your tank?

The primary purpose of your filter is to do a couple of things:

First, it should trap waste and debris so you can remove them. Fish poo and debris will get stuck in your filter and later removed as you clean the filter or replace its media.

Second, and more important, the filter provides a place for biological filtration.

Here is a quick review of the nitrogen cycle in your tank. Fish waste converts to ammonia. The ammonia is consumed by one type of bacteria and converted to nitrite. Another type of bacteria consumes the nitrite and converts it to nitrate. Both ammonia and nitrite are harmful to your fish at even small levels. Nitrate is also harmful, but fish can tolerate a moderate level of nitrate.

[su_note note_color="#e2e2e2"]With this in mind, we prefer chamber filters over cartridge filters for one simple reason: they provide more filter media area for bacteria and more ‘water contact time’ during the filtration process. [/su_note]

Superior contact with chamber filter type

The Aqua Clear filter, for example, has a chamber several times thicker than cartridge filters.

#3: Extra functions

Filters are sold with many bells and whistles. Some of these
might be worth considering for your next filter.

Adjustable flow rate

Delicate fish and plants require a lower flow rate in the tank. Being able to adjust the flow can help you do what is best for your fish.

Also, if you want to breed fish, then turning down the flow rate during breeding will help achieve success.

Clogging indicator

Most filters fill up with dirt at some point. You will soon be able to tell just by looking at your tank if this has occurred.

However, some filters make this even easier. They tell you when the filter is clogged. We think anything that makes tank maintenance easier is a big bonus.

Self-priming

Filter impellers are designed to run while full of water. Self-priming filters do not require you to pre-fill them before activating the filter.

Priming a filter isn’t difficult, but why add extra work? Again, anything that makes tank maintenance easier is a big bonus.

Loudness

We all want to see our fish tanks. We don’t want to hear our tank filters. Achieving silent filtration is almost impossible due to the impeller running. However, some filters are quieter than others. This may be important to you based on where your tank is set up.

#4: Warranty

Filters don’t have too many moving parts. Many of them work for years without any problems.

However, a good warranty will help you if a problem does occur. Longer warranties are better. Also, you can look for filters with a trial period or good returns policy.

#5: Customer Ratings

As an aquarium keeper, you are part of a worldwide family of
fish lovers. Read what others say about their filters. Try to find reviews from
customers whose tanks are set up like yours. Their thoughts may help you choose
the best power filter.

#6: Price

Brand names can make a big difference to price in the
fishkeeping world. Brands such as Fluval command a premium price tag. If you
can afford it, then buy the best. We can show you how to optimize your filters
to get the best performance even if you buy a slightly less expensive choice.

Now you know what you are looking for. Let’s peek at the top five best hang on back filters. When we’re done, we’ll tell you which one we would choose.

5 Best HOB Filter Review

Before you dive into looking at
each filter in detail, please check out this helpful table. It compares the
features of each filter. You’ll find the information presented clearly and
simply to help you make a quick comparison.

Comparison table

[INSERT TABLE]

1. Aqua Clear - Fish Tank Filter

The first filter on our list is the Aqua Clear series of
filters. These are numbered 20,30,50,70, and 110 to correspond to increases in
the tank size, measured in gallons, for which the filter is suitable. Aqua
Clear is a world-renowned maker of aquarium supplies. This filter will not
disappoint you!

Aqua Clear has created a filter designed to lengthen the time your water is in contact with the filter. Water is pumped through the intake and into the bottom of the filter chamber. The water then rises through a series of filter pads before falling down a waterfall into the tank. Extending the length of filtration helps remove impurities. It also lengthens the time available for bacteria to break down ammonia and nitrite.

The magnetic impeller motor is very durable. Returns due to motor failure are almost unheard of. Once set up correctly, the motor is very quiet, and the sound of the waterfall is easily heard.

Adjustable flow control makes caring for your fish simple. Aqua Clear’s flow adjustment doesn’t reduce the speed of the motor but changes the volume of water being moved. This allows for maximum filtration, even at lower water speeds.

Maintaining the filter is very easy. The lid opens to allow
easy removal of the filter basket. Replacement filters are needed as often as
once a month for the activated carbon. They can be purchased easily on Amazon.

We’d like to see a clog indicator on this filter. This might help slightly less attentive fish keepers to remember to change the filters. A self-priming function would also be a nice addition to this otherwise brilliant unit.

Apart from these minor improvements, this filter is everything you could want in a simple design.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Highest filtration quality with the largest filter media volume.
• Adjustable flow rate
• Can be used with other filter media
• Suitable for tanks up to 110 gallons
• Very high customer ratings
• Great value for money

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Not self-priming
• No clog indicator

[/su_list]

[su_button url="https://www.amazon.com/Aqua-Clear-Fish-Filter-Gallons/dp/B000260FUM/ref=as_li_ss_tl?keywords=Aqua+Clear+-+Fish+Tank+Filter&qid=1577719685&sr=8-9&linkCode=ll1&tag=ap250e-20&linkId=843eab3e2203bde2ab5e648705338ca3&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check price on Amazon.com[/su_button]

2. Fluval C Power Filter

Fluval is another widely recognized aquarium brand. Their
C-series filters have been on the market for years and have earned a great name
for themselves. They are powerful, relatively quiet, and are some of the most
durable filters available.

The main selling point is Fluval’s 5-stage filtration
system. Water passes through these stages on its way through the filter:

• Coarse Foam Pad – The first stage removes the largest particles from the water. This is where the fish poo and other dirt is most likely to be captured.
• Fine Foam Pad – Following the coarse pad, the finer foam snags smaller particles and breaks up micro-bubbles in the water.
• Activated Carbon Insert – Activated carbon has a huge surface area compared to its volume. This is ideal for removing unwanted odors, discolorations, or other chemical impurities.
• Bio-Screen – A portion of the water is diverted to pass through this bio-screen. This extra step ensures better water distribution in the final portion of the filtration process.
• C-Nodes – The Fluval’s C-Nodes are biological filter media. These star-shaped inserts promote the growth of beneficial bacteria to process ammonia.

All these stages add up to very clear water and happy fish.

Fluval has also created a flow rate adjustment system to maximize efficiency. When the flow rate is reduced, up to 50% of the water is recirculated through the filtration chamber. This ensures the water is clean and clear even when the flow rate is reduced for breeding or feeding.

To make this filter even better, we’d like to see a self-priming feature. This would assist in maintenance. It would also be nice to see a bigger tank capacity since this is limited to tanks smaller than 70 gallons.

Still, these minor drawbacks don’t take away from the quality of this superb filter.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• High build quality
• High filtration quality with large filter media volume
• Adjustable flow rate
• Clog indicator

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Not self-priming
• Expensive
• Limited to tanks smaller than 70 gallons

[/su_list]

[su_button url="https://www.amazon.com/Fluval-14002A1-C3-Power-Filter/dp/B003SJQJ46/ref=as_li_ss_tl?keywords=Fluval+C+Power+Filter&qid=1577844403&sr=8-2&linkCode=ll1&tag=ap250e-20&linkId=3c3011068af5d2fb0723f29521b514ee&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check price on Amazon.com[/su_button]

3. MarineLand Penguin 350 BIO-Wheel Power Filter

The Penguin 350 is one of the more attractive filters on the
market. Many people are mesmerized by the sight of the spinning bio wheels.
This extra interest enhances the beauty of your fish tank.

Apart from its physical appeal, the Penguin 350 is also a
great filter. MarineLand has produced filters for more than 40 years. Their
designs are reliable and work well for many thousands of aquariums.

An intake tube pulls water from the tank into the body of the filter. Once inside, water passes through three stages of filtration.

First, a Rite-Size filter floss cartridge traps particles and dirt.

Second, water is passed through the Black Diamond activated carbon pad. This cleans chemical impurities from the water.

Third, as the water leaves the filter, it flows through a third filtration stage. Here is where the bio wheels come into action. These work like water wheels, turning as the water passes over them. They add biological filtration to the setup and assist the nitrogen cycle in your tank.

The mid-filter allows for some control of the flow rate. This is very helpful for managing water movement around smaller tanks.

Some improvements could be made by adding a clog indicator and self-priming function. Even without these, the Penguin 350 receives great feedback from customers. As the cheapest filter on our list, it’s a great purchase.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• The cheapest filter
• Long warranty period
• Adjustable flow rate
• Highest customer ratings

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Not self-priming
• No clog indicator
• Limited to tanks smaller than 70 gallons

[/su_list]

[su_button url="https://www.amazon.com/Marineland-Penguin-Power-Filter-50-Gallon/dp/B0009IODZG/ref=as_li_ss_tl?keywords=MarineLand+Penguin&qid=1577845953&sr=8-1&linkCode=ll1&tag=ap250e-20&linkId=60b534cb723167a6e1950fd70b82b92a&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check price on Amazon.com[/su_button]

4. Aqueon QuietFlow LED PRO Aquarium Power Filters

Some people don’t want to hear their fish tank equipment.
The Aqueon QuietFlow filter series is perfect for those who want a silent
setup. The filter’s motor sits down inside the tank. This allows the water to
muffle sound effectively.

The motor is not loud when set up properly. This is also a self-priming pump, so no extra water is required during installation or maintenance.

Quick tip:

Air can become trapped in the impeller and this can lead to extra noise. Adding a little water into the filter or switching it off and on rapidly a few times should clear this problem.

The filter includes three filtration stages.

First, dense floss pads remove unwanted debris.

Following this, an activated carbon pad eliminates unwanted odors and chemicals.

Finally, the water passes through a ‘bio-holster.’ This biological filter promotes the nitrogen cycle by giving a platform on which ammonia-converting bacteria will grow.

Another aspect of the quiet design is the final segment
of the filter. Water passes through the first three stages and then moves into
another sponge pad. This coarse pad, called a diffuser grid, reduces the amount
of noise created by the water returning to the tank.

Aqueon has included a clog indicator in the design of this self-priming pump. This helpful feature lets you know when it’s time to change the filters. We’d like to see a longer warranty and an adjustable flow rate, though.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Quietest HOB filter
• Self-priming
• Clog indicator

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Unable to adjust flow rate
• Short warranty period

[/su_list]

[su_button url="https://www.amazon.com/Aqueon-QuietFlow-Aquarium-Filters-50-250GPH/dp/B004W50KKY/ref=as_li_ss_tl?keywords=Aqueon+QuietFlow+LED+PRO&qid=1577847274&sr=8-2&linkCode=ll1&tag=ap250e-20&linkId=af5d5d4591e89c61fa905434b965899e&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check price on Amazon.com[/su_button]

5. Penn Plax Cascade Hang-on Aquarium Filter

Our final entry is the Penn Plax Cascade filter. This
nifty little package is great for providing simple filtration options for tanks
of different sizes. The Cascade 300 moves enough water to service tanks as
large as 100 gallons. The smallest filter, the Cascade 20, is great for small
tanks up to seven gallons in size.

One of the best features of these filters is their
adjustable flow rate. Small tanks and delicate fish need a lower water flow.
The Cascade 20 is perfect for small tanks and gentle fish, such as Betta. The
low flow will not stress the fish or disturb the substrate.

Filtration is achieved by pour watering through a sponge
system, followed by an activated carbon cartridge. The water then passes
through the Bio-Falls Quad Filtration system. This system is designed to circulate
oxygen in the water while also allowing bacteria to grow and remove ammonia and
nitrite from the tank.

We really like the adjustable flow rate and the extended warranty. However, this filter could be improved with the addition of a self-priming function, a clog indicator, and better biological filtration for smaller tanks.

Pros:

[su_list icon="icon: check" icon_color="#3ef323"]

• Longest warranty period
• Adjustable flow rate
• Suitable for tanks up to 100 gallons

[/su_list]

Cons:

[su_list icon="icon: remove" icon_color="#FF4500"]

• Not self-priming
• No clog indicator
• Low customer ratings
• No biological filter media for small tanks

[/su_list]

[su_button url="https://www.amazon.com/Penn-Plax-Cascade-Aquarium-Filtration/dp/B0002DJ812/ref=as_li_ss_tl?keywords=Penn+Plax+Cascade+Hang-on&qid=1577848496&sr=8-1&linkCode=ll1&tag=ap250e-20&linkId=5109e387065755e97593d51d47361bf8&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Check price on Amazon.com[/su_button]

Our Best HOB Filter

Best Value HOB filter: Aqua Clear

The Aqua Clear Filter is our top choice. Its filtration quality is superb. The adjustable flow rate increases this filter’s flexibility.

Also, being able to use other filter media enhances the filter’s capabilities. We think, for the money, this is the best power filter you can buy.

Do you want Aqua Clear HOB Filter?

[su_button url="https://www.amazon.com/Aqua-Clear-Fish-Filter-Gallons/dp/B000260FUM/ref=as_li_ss_tl?keywords=Aqua+Clear+-+Fish+Tank+Filter&qid=1577719685&sr=8-9&linkCode=ll1&tag=ap250e-20&linkId=ba916dcfa8a82c4f221d9bb2639b97bc&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Yes, I want to order now! [/su_button]

Another option: Fluval C Power Filter

For those who don’t mind paying extra for a few bless and whistles, the Fluval C Power Filter could be a good choice. Fluval’s filtration quality is much better than other filters for the reasons we described above.

The clog indicator will remind you of the need for maintenance. Fluval parts and accessories are widely available. Buying new pads and filter media will be easy.

Do you want Fluval C Power Filter?

[su_button url="https://www.amazon.com/Fluval-14002A1-C3-Power-Filter/dp/B003SJQJ46/ref=as_li_ss_tl?crid=1U7XRNH0XF5RJ&keywords=fluval+c+power+filter&qid=1577849477&sprefix=Fluval+C+Power+,aps,604&sr=8-2&linkCode=ll1&tag=ap250e-20&linkId=8028163c6c74a7c9a59496736bcdfd9c&language=en_US" target="blank" style="flat" background="#ef352d" size="7" center="yes" radius="5" icon="icon: hand-o-right" icon_color="#ffffff" text_shadow="0px 0px 0px #000000" rel="nofollow"]Yes, I want to order now! [/su_button]

HOB Filters FAQ

People ask many questions about HOB filters. Here, we’re
going to answer some of the most common questions we receive.

What is an HOB filter?

There are three places a filter can go: in the tank, on the tank, and below the tank.

Internal filters sit inside the tank. HOB filters fit onto the tank’s rim and are usually positioned at the back of the tank. Canister filters and sumps are larger and sit below the tank (or somewhere else nearby) and are connected by hoses.

So, an HOB filter is a water filtration system that hangs on
the back of the aquarium.

How does an HOB filter work?

Generally, HOB filters work by drawing water through an
intake tube into the filter chamber. Inside the filter chamber, the water
passes through a series of filter media before being returned to the tank. The
filter media provide mechanical, chemical, and biological filtration to clean
the water.

Are HOB filters good?

They work well for many aquariums. Owners may prefer them because they do not take up room inside the tank.

Also, because they are outside the tank, maintenance can be a little easier. They may provide less water flow than an internal filter, though.

What is the difference between a canister filter and an HOB filter?

A canister filter sits below or beside the tank and is connected by hoses. Generally, canister filters are larger and contain more filter media. This makes them better at keeping the water parameters (such as pH and hardness) stable. They can also be used for larger aquariums. However, they also require more power, are a little more difficult to set up, and can be much more expensive.

So, if you want better water quality for your tank, and money and maintenance are not issues, choose a canister filter. If your tank does not need a lot of water filtration or you want a cheaper and easy-to-maintenance filter, an HOB filter is your choice.

Can I use HOB filter for the saltwater tank?

Sure! All our suggested products can be used in saltwater as well as freshwater tanks. The main difference is the biological filtration being done in a reef tank by the live rocks.

Grab an Aqua Clear filter, take out the biological stage,
and replace it with more mechanical filtration. This will help keep the
particulate matter under control in your saltwater tank.

Conclusion

Now you know our thoughts on the best hang on back filters
on the market. Any of these five will work but we recommend the Aqua Clear
filters.

What are your thoughts? Please let us know if we’re correct
or if we missed a filter you love!

Read the original article at :
5 Best HOB Filters – A Complete Review & Comparison Guide (in 2019)