5 Best Canister Filter For 20 Gallon Tank – (2024 Reviews)

Thinking of keeping an aquarium just because you are fond of fish? And worried too about how to keep an aquarium clean? Well, if you are really serious about keeping an aquarium, then stop worrying and start looking for an appropriate filter that works best to keep the water clean and purified. Getting a good filter for an aquarium might be a hassle and problematic if you are keeping the aquarium for the first time.

A variety of filter tanks are available in the market, but selecting the best one which provides high-quality filtration is ticklish to find. Well, let’s finish the chaos and read the article for the best canister filter for a 20-gallon tank. The canister filters are versatile in nature and are superior for cleaning all types of water. These filters are basically known for the wide and long containers, and you can also use them for different purposes.

Best Canister Filter for 20 Gallon Tank

5 Best Canister Filter For 20 Gallon Tank

For getting the best canister filter, you check the water volume of the tank and buy accordingly. If you have a 20-gallon tank, then for that, the canister filter would be the best one to purchase. The canister filter is basically for the wide tanks and provides the perfect filtration system. Here are some best canister filters for 20-gallon tanks that will surely make it easier for you to select the best one.

Canister Filter For 20 Gallon Tank Canister Filter For 20 Gallon Tank
Fluval 07 Canister Filter For Aquariums
  • Vertical mechanical filtration.
  • Easy priming handle.
  • Quick-release hoses.
  • Chemical, Mechanical, and bio media included.
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Best Aquarium Filter For 20 Gallon Tank Best Aquarium Filter For 20 Gallon Tank
Cascade Canister Filter
  • Transparent filter body.
  • Quick-release hose.
  • 115 GPH.
  • Flow valves can rotate 360 degrees.
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Best Filter For 20 Gallon Tank Best Filter For 20 Gallon Tank
Eheim Filter 2213-37 Classic by Eheim
  • 116 GPH.
  • Includes both mechanical and bio media.
  • Open canister with no trays.
  • Reliable.
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Best 20 Gallon Fish Tank Filter Best 20 Gallon Fish Tank Filter
Marineland Magniflow Canister Filter for Aquariums
  • 160 GHP.
  • Identical canister lid clamps.
  • Mechanical, chemical, and bimedia are included.
  • Quick-release hose.
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Best 20 Gallon Aquarium Filter Best 20 Gallon Aquarium Filter
Aqueon Quietflow Canister Filter
  • Offers three-stage filtration.
  • Quite while operating.
  • Horizontal and vertical installation.
  • Cartridges can be changed easily.
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1. Fluval 07 Canister Filter For Aquariums – Canister Filter For 20 Gallon Tank

Fluval 07 Canister Filter for Aquariums

The Fluval 07 canister filter is the best to pick for aquarium filtration. It has a unique ergonomic design, and the features it offers are quite unique from the other filters. The ergonomic design of this filter helps to lift the lip, which provides tranquil functioning. It has a big sponge of 107 that fits vertically inside the filter.

There are a variety of filter functions available, and you can start with any of the media filters. The dual locking clamps are present, which provides a proper sealing lock for a hasty discharge and attachment. The quick-releasing hoses provide proper maintenance of the aquarium tank.

This new series of 07 canister filters are powerful and reliable. It works as an expert while filtering the aquarium tank. Its features are also upgraded by 25%, which makes it more energetic and powerful. The robust construction of this filter protects it, making it flexible and easier to use. The one faulty thing about this filter is that it does not have a spray bar. You can buy it separately, but that’s optional.

User’s Reviews

This is what users of this canister filter have to say.

This filter is amazing! Keeps my turtle tank clean and clear.
What do we like?
  • Easy maintenance
  • Variety of filter media available
  • Media basket can be removed easily
  • Good quality
What don’t we like?
  • No spray bar

Our Opinion

This filter provides an outstanding filtration system. It keeps your aquarium clean and provides a healthy environment for the fish. The high-quality performance convinces one to buy it for satisfactory results. Once after the right installation, it will provide an amazing filtration process.

2. Cascade Canister Filter – Best Aquarium Filter For 20 Gallon Tank

Cascade Canister Filter

The cascade canister filters are basically built for the large aquarium fish tanks. It has two media baskets that improve the filtration power and increase its functioning ability. This filter is best to work for 30-gallon fish tanks. Its flow valve can rotate about 360 degrees which allow easy fitting of filters under the tank stand.

It also includes other features like directional tubing spout, spray bar, and filter medium. The floss pad and the spongy surface protect the walls from bacterial infections and fungi. The hose clamps provide the proper fitting and avoid escaping the fluid.

The vacuum suction of this filter provides easy alignment, which purifies the water and removes all the solid particles. Other filter media are also available with it but that is sold separately including, bio-rings, bio-floss, pro-z, pro-carb-z, and many more. There is no bio-media included in this tank filter.

User’s Reviews

This is what users of this canister filter have to say.

I am using this in a 29 gallon tank. it has never leaked. easy to set up and clean out. come with a nice spray bar that you can decide what lenght you want it to be. i purchased this model because i also have the 1000 model in my 75 gallon tank and it is 5 star!!!

What do we like?
  • Includes filter media
  • Easy fitting under the water tank
  • Rotating flow valves are available
  • Remove impurities
What don’t we like?
  • Bio media is not included

Our Opinion

The Cascade canister filter is best for large size aquariums. It is durable and protects the filter to enhance its use for a longer time. The product lasts long if you are properly maintaining it. This filter works smoothly and filters the aquarium accurately and fastly.

3. Eheim Filter 2213-37 Classic by Eheim – Best Filter For 20 Gallon Tank

Eheim Filter 2213-37 Classic by EheimThe Eheim filter is a classic and simple filter that one can use for filtering a fish tank. The media is loose inside the tray rather than fitting in it. The use of this filter is quite simple and easy. This filter has both pros and cons, but it provides a satisfactory experience to the user.

One can use it and will surely like it because of the specifications and features it offers. These filters are small and not that big, which can easily be hung inside the tank. Its small size does not affect its working ability as they perform well even under a great volume of water.

While working, it does not make noise and works silently. Well, besides that, it has no priming button; for cleaning the primer you need to detach it each time. It also has no media trays, which makes it quite difficult to bring it out for cleaning. But apart from that, it is economical to buy.

User’s Reviews

This is what users of this canister filter have to say.

Great working aquarium pump for longevity. Even though it’s old school better then new school,session just began.It cleans clarify the water perfectly.And most of all it is well build with quality standards!..so if you’re looking for a aquarium pump buy this one.For you will not be disappointed!!!!

What do we like?
  • Simple and unique design
  • Affordable price
  • Reliable
  • Does not make noise
What don’t we like?
  • No priming button

Our Opinion

The Eheim canister filter is of high quality and works outstandingly. This model is quite unique and performs its job well. It is easy to set up once you have read the manual and followed the steps. Its robust construction makes it durable which ensures its long-lasting working.

4. Marineland Magniflow Canister Filter for Aquariums – Best 20 Gallon Fish Tank Filter

Marineland Magniflow Canister Filter for AquariumsThe Marineland Magniflow is another best canister filter for purifying Aquarium tanks. It has a great round canister filter which reduces the nitrate level and filters the water. The design of the filter is quite amazing, especially the design of the quick hose release. You can easily detach the hose for cleaning as it seems tight while securing.

This filter is a three-stage filtration process, which allows the water to flow in layers, making sure that the water is properly cleaned. This filter is versatile in nature and is best for both the saltwater and freshwater aquarium. It has a fast setup which consists of the simple lifting of water-tight canisters for easy removal.

It has a valve block for effortless maintenance which quickly shut down the water flow. This filter is reliable and has advanced technology features. The clamps are all the same in this canister filter, which is a keen feature. It has no bio balls, which you might need to replace afterward.

User’s Reviews

This is what users of this canister filter have to say.

This keeps my fish tank super clean! I was worried about ordering this one because of mixed reviews but I’ve had mine for months now and it is still in great condition. I personally think it doesn’t make much noise at all and the noise it does make is peaceful.

What do we like?
  • Quick hose release
  • Simple lid installation
  • Filter media are included
  • Effortless maintenance
What don’t we like?
  • Bio balls are not available

Our Opinion

This is an upgraded model of Marineland Magniflow which has a good capacity. It offers the best features and performs well. It is flexible and provides the best cleaning service. It comes with a 3 years warranty.

5. Aqueon Quietflow Canister Filter – Best 20 Gallon Aquarium Filter

Aqueon Quietflow Canister FilterThe Aqueon Quietflow canister filter is the ideal aquarium filtration system for fish tanks. It is powerful and provides a three-stage filtration system, which double-checks the filtration of water. It comes in different sizes, and you can buy them according to your aquarium size.

The suction cups are also available with it, which are easy to install and work efficiently. This filter has an adjustable rate of flow, so you can install it vertically and horizontally. The best thing about this filter is that it works quietly and requires no priming.

It is very simple to assemble and provides an amazing system. The spray bar, connections, outputs, and water detector are also included with it. This filter is best to use for 55 gallons because of its large size. It removes all the toxicity and purifies the water efficiently. Its big size mostly takes up a lot of space inside the aquarium.

User’s Reviews

This is what users of this canister filter have to say.

Very quiet. Surprised at how quietly it runs compared to the HOB that I’d been using. Have 2 of these 55gl freshwater aquarium and haven’t had any issues

What do we like?
  • Available in different sizes
  • Efficient working
  • Works silently
  • Three stages filtration
What don’t we like?
  • Takes most of the space
  • The smallest size lacks some filtration

Our Opinion

The Aqueon Quiteflow canister filter is available in different sizes and it works silently. If you have a big size aquarium then it is the best filter that you can select. It purifies water smoothly without making any noise. It is available at an affordable price and cleans a large area of the aquarium.


What is the best filter for a 20-gallon tank?
There are a variety of filters available for a 20-gallon tank, but the best one to get is the Aqueon Quietflow canister filter. The best thing about this filter is that it comes in different sizes, and you can buy it according to your own aquarium size.
Are canister filters quiet?
Canister filters are one of the most silent and quiet operating filters. They function smoothly without making noise.
Are canister filters worth it?
Yes, the canister filters are worth buying because of their performance and maintaining the aquarium water filter. They remove all the harmful substances from the water and clean it, which improves the life of the fish inside.
How long do canister filters last?
Canister filters work for a long time, depending on their power and durability. The best quality canister filters work for 3-4 months, depending on its construction.


Now, you are surely clarified about the best canister filter for 20-gallon tanks. You can pick the one according to your aquarium size and power of filter functioning. All the above-mentioned products work best for 20-gallon tanks. As a recommender, I’ll suggest for:

Start your own aquarium by grabbing the best canister for your fish tank!

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