Home Aquarium Filter The Best Aquarium Filter 20 Gallon Tank 2020

The Best Aquarium Filter 20 Gallon Tank 2020

The Best Aquarium Filter 20 Gallon Tank  2020

A 20-gallon tank or aquarium is very large indeed. It can accommodate 15 to 20 small fish, which can easily get dirty if not cleaned every day. Therefore, it needs proper maintenance and an excellent cleaning system to keep the water clear, clean, and the fish thriving. If you want to keep your aquarium water in pristine condition at all times, the best way to do so is to use the best filter for 20 gallon aquarium.

But before you decide to purchase an aquarium filter 20 gallon tank, you need to know each product’s strengths and weaknesses. This article will provide you an in-depth review of several leading in-tank filter brands. This way, you will have an informed decision before finally using the brand that you have chosen.

The Best Aquarium Filter 20 Gallon Tank Reviews 2020

An in-tank filter for 20-gallon aquariums should not only be strong enough but also quiet. However, not all filters out there in the market cannot do that. If you are looking for the perfect in-tank filter for you aquarium, perhaps the Whisper IQ Power Filter for Aquariums will satisfy your needs.

What I like about this filter is quiet operation. This is one of the features that a good in-tank filter should have. I can truly enjoy watching the fish swim around in total peace. This very practical to use in home offices, libraries or man caves where comfortable silence is required.

  • Quiet
  • Flow control up to 130 GPH
  • No priming needed
  • Durable
  • Easy to use

If you wish to keep your aquarium free from unwanted particles, unwanted organisms, and unwanted chemicals which causes discoloration, the filter that you should be considering in your shopping list is Marineland Penguin Power Filter w/ Multi-Stage Filtration.

I like so many things about this particular filter. First is the flow rate. With 150 GPH, I know that the water circulates in the aquarium properly. Its adjustable mid-level intake is another thing to be proud of. It uses a Rite-Size B cartridge

  • Up to 150 GPH
  • Uses Rite-Size B cartridge
  • Adjustable mid-level intake
  • Can be used with 30-gallon tanks
  • Three stage filtration system
  • Ideal for freshwater and saltwater fishes
  • Quiet
  • Durable
  • Easy to install

Nothing beats a filter that delivers not only top performance but also energy efficient. If you want your tank to be clean and clear at all times, the best in-tank filter that you should be using is the Aqua Clear 110.

What I liked about this particular filter is it delivers a top notch filtration system. It has a patented filtration system that allows me to control the water’s flow rate without compromising the effectiveness of filtration in the process. Once I turn the flow rate down, 50% of the water that is inside the filter chamber is processed multiple times. This is actually beneficial for fishes and plants that requires slow water flow rate.

  • Has a patented filtration system
  • Energy efficient
  • Easy and quick to install
  • Comes with activated carbon, BioMax and Cycle Guard, and Aqua clear Foam
  • Comes with a 2-year warranty

I have not yet seen any filter that gives a 4D-clean aquarium like the Cascade Hang-On Aquarium Filter with Quad Filtration System of Penn Plax. I literally see, feel, and smell clean water!

Six months ago, I purchased Cascade 100 unit sized 6.5 in. x 6 in. x 6 in. The filtration capacity is 100 GPH, good for up to 20-gallon aquarium of fresh or marine water.

It is a hang-on filter designed for modern aquariums. The self-leveling case keeps the filter level. The adjustable knob and intake tube allow easy filter manipulation.

  • Effective Quad-Stage cleaning
  • Noise-free
  • Large capacity motor

As much as we want to be always there for our lovely fishes, there are times when we can’t. So, it is best to find pet essentials like Fluval C Power Filter to give us peace of mind and assurance whenever we leave them in their aquariums.

There are 3Cs in Fluval’s Power Filter Line. I have the C2 model at 119 GPH, good for an aquarium with 30-gallon volume. There are also available C3 and C4 filters at 153 and 264 GPH, respectively. My C2 filter has a dimension of 8 in. x 6 in. x 4.5. in. All Cs have the same filtration system. The only difference is pump motor capacity.

  • Five-stage filtration
  • Noise-free
  • Large capacity
  • Easy to maintain
  • Affordable

I don’t know about you, but I always trust quality products from companies like Tetra. We can never go wrong with Whisper In-Tank Filter!

This inexpensive and affordable filtration system acts as both a filter and pump for a 20-gallon aquarium or terrarium. Its size is 4.2 in. x 4 in. x 8 in. The product line also has filters for a volume range of 3 to 40 gallons.

I was convinced to buy this because of the BioScrubber and Bio-bag filter cartridges. These are the keys to effective and eco-friendly filtration. These can be changed regularly or as needed.

  • Efficient cleaning
  • Simple design
  • Fits in an aquarium or terrarium
  • Inexpensive

Are you looking for a way to maximize your aquarium’s space without sacrificing the filtration capacity of your in-tank filters? Try using the Aqueon Quietflow E Internal Power Filter.

What I appreciate about this filter is its slim design. It can filter the water without consuming too much space. I can see the fish, plants, and the decorations inside the aquarium without my view getting interrupted. Even though it is compact, it can deliver top notch performance that only some brands in the market provides. With it 60 GPH flow rate, I am confident that my Blue Tangs will thrive properly.

  • Its vertical design saves plenty of space
  • It has a three-stage filtration system
  • Auto-start pump resumes operation if interrupted
  • Easy to install through suction cups
  • Comes with a limited lifetime warranty

A highly customizable in-tank filter is truly rare. If you are looking for a good filter that can deliver a solid filtration performance without being too faithful with the manufacturer’s spare part recommendation, the best product to use is the Tetra Whisper Power Filter.

When I heard about this particular filter’s performance from a friend who uses it, I admit that I was truly curious. I immediately purchased Tetra Whisper Power Filter and replaced my existing in-tank filter with this one. After a few hours of testing it, I have seen that it delivers an excellent filtration comparable to other brands in the market these days.

  • Can be used with smaller aquariums up to 20-gallon tanks (also use for 10 gallon aquarium)
  • Uses three filters in one unit
  • Highly customizable internal layout
  • Compact
  • Durable

Keeping your pet fish properly aerated all the time can be achieved if the filter that you are using has a spray bar. However, not all in-tank filters have this feature. If you want your fish to thrive for a long time, the canister filter for 20 gallon tank that you need to try is the Cascade Canister Aquarium Filter by Penn Plax.

The multi-stage filtration system works as intended; it removes unwanted particles, keeps the water clean and clear by filtering chemicals, and keeps harmful organisms such as bad bacteria and fungi away. Its large stackable media gives way for multi-stage filtration.

  • It has a multi-stage filtration system
  • It comes with a spray bar
  • The connectors and tubes are of high quality
  • Self-priming

There are many things to appreciate about this particular filter. First is the design. I was completely surprised to find out that despite its slim design, its filtration power is comparable to similar brands with larger designs. With only 3.8 x 11.5 x 6.5 inches, who would’ve thought that this filter possesses a powerful motor that will clean your tank every day? In addition, its slim design allows me to see more of my pet fish and the decorations I have placed inside the tank without the filter getting in the way of my view.

Another positive feature of this in-tank filter is the adjustable flow control. I hate replacing my fish every now and then. Lowering the flow rate provides less stress to fish. Also, with this option, I can lower it down to prevent food debris from entering the filter chamber. But with this feature, I can set the best flow rate that my pet fish needs to thrive inside my 20-gallon aquarium.

  • Slim design but powerful
  • Can be used to filter aquariums up to 20 gallons
  • Self-priming
  • Operates silently
  • With adjustable flow control
  • Easy to maintain
  • Durable

What to Look for When Buying Aquarium Filter 20 Gallon Tank ?

The 20 gallon aquarium tank is by far the most versatile tank for most hobbyists around the globe. Both seasoned and upcoming enthusiasts look at the 20 gallon aquarium tank for its great size, as this allow it to serve as a starter aquarium, a species tank, and a breeding tank among others.

With a tank this famous, it comes to no surprise that people are going to be looking for the right tank filter. However, that can be tricky because a lot of people tend to not know the factors to consider in choosing the right filter for the specifics of your tank. And so I have created this simple list of things that everyone should consider when buying a filter for a 20 gallon aquarium tank!

What Is An Aquarium Filter 20 Gallon Tank?

To learn what the proper filters is for a 20 gallon tank, one must first ask “What is a 20 gallon aquarium tank?”. The 20 gallon tank is probably the most used among the tank-types out there. This is rightly so because of its advantageous size, which allows for versatility. This versatility is sought after because the 20 gallon tank can be used in a number of ways, basically drawn down to three.

The 20 gallon tank makes for a good species tank. A species tank is a special kind of tank that aquarium collectors create specifically for only a certain type of fish. There are many reasons collectors set up a species tank. First and foremost is fascination. Some enthusiasts, myself included, enjoy just seeing their favored species swim together in a tank of their own. Second is behavioral. Fish behavior is an important factors to consider in our line of hobby. Some fishes can be territorial and aggressive, fighting off and even eliminating other species. Some can be timid and slow, and are then consumed by the predatory fishes. Fishes just really prefer to be with their species. The third reason is health, like when certain species require unusual set-ups that just would not be beneficial for other species. Basically, when the environment needs to be fine-tuned just for a special species, then creating a separate tank becomes a need. With these reasons, collectors make use of the 20 gallon tanks as a separate species tank.

The 20 gallon tank is also known for breeding use. The 20 gallon breeding tank is common nowadays especially for the professionals collectors and breeders because it has just the right dimensions. For as long as the fishes you are to use will not grow beyond what is limited to the dimensions, then it is fine. Most starting breeders use the 20 gallon tank to breed fishes like swordtails, platies, and guppies.

The third major use for the 20 gallon tank

is the community tank. Arguably the most tank-type’s most famous variation, the community tank harmoniously brings together different species of different colors and different sizes. For as long as the environment is positive for all the species, the 20 gallon tank gives a great viewing experience for collectors.

After learning how most people use the 20 gallon tanks (and choosing how you would like to proceed with yours), you should then take a look at the filters.

The filters are owner’s second-in-command when setting up a tank. It does everything from cleaning up the mess that the fishes and the plants leave off and to influencing the chemical reactions in the water itself. Because the 20 gallon tank is a popular tank, it comes to no surprise that special tank filters built for the 20 gallon tanks are made by companies nowadays. And so, only after choosing how you would use the tank should you choose the filter that is right for the job.

Why do you need an Aquarium Filter 20 Gallon Tank?

Keeping fish as pet is no easy task, and most enthusiasts know to consider numerous factors in order to provide a healthy environment for their little friends. The water quality, the environment, the waste management, these are all things that would affect how you raise your pets. And so, keeping this in mind, you should only choose the right materials and equipment. 20 gallon tank filters are built specifically to aid you in creating an amazing fish environment in the 20 gallon tank.

All in all these are some of the most basic and important factors to consider when choosing the right 20 gallon tank filter for you. Always keep this in mind, so the next time you go to your local store, you know what to look for and why!

Where to buy Aquarium Filter 20 Gallon Tank?

You can buy in-tank filters in your favorite pet stores. You can also visit shopping places such as Walmart, Costco, and Home Depot. However, if the specific brand or design is not available in your local pet store, you can always try to shop online. Amazon.com is a great website to launch your search for the perfect filter for your aquariums or tanks


Now that you’ve seen the reviews for the best filter for 20 gallon aquarium, you can now proceed to purchase the one that will suit your specific needs. Always remember, though, that not all of the filters mentioned here have the same performance. Although they were designed to perform a specific task, their performance in actual situation varies a lot. Finally, before installing and using the filters, make sure that you read and understand the instructions in order to prevent experiencing any adverse situations that could affect the living conditions of the fish inside your aquarium.