All You Need To Know About The Best Filter For Betta

Keeping the right water condition is one of the inevitable factors in fish care, which you can only achieve with the best filter for betta. Without it, your fish won’t be likely to stay healthy and happy.

In addition, the great filtration system will keep your fish tank clean and your water clear. In this article, we will bring up the significance, buying guide, and, more importantly, the list of best filters you could purchase.

[amazon box=”B0002DHYG8,B000260FVG,B07JFY2QW6,B0002APVAC,B003JMTTL2,B0009IMDQM,B003SJQJ46,B004W50KKY,B0002DJ82G,B001CHVKPY” description=””]

Why Do You Need A Betta Fish Filter?

Is a filter really necessary for a fish tank? The answer is Yes. It’s the right decision to get the best filter to take care of your lovely betta fish at home.

Bettas love clean water and a clean tank. An unhealthy tank tends to leave them with stress, which you could easily detect by their dullness. Fortunately, they are not picky. If you do not want to pay extra for a filter, changing the water regularly would also be a good choice.

However, getting a filter still sounds better than doing that daunting task.

Bettas Love Fresh Water

Bettas Love Fresh Water

The best filtration system helps you clean your tank. Like other fish, betta generates debris and waste, which requires you to change the water periodically. The filter allows you to save time in removing your fish while cleaning and go longer without water changes.

Moreover, a filter can eliminate toxins, including nitrates and ammonia, from betta’s waste so that your water stays clean and clear for longer. As it aerates the water, the filter also generates more oxygen in the water for your betta to breathe.

From an aesthetic perspective, the clean water maintained by the filter provides you with the best view of betta. Indeed, you can see through your betta tank while your fish colors present more vividly. 

Overall, your maintenance work would become less time-consuming, thanks to the filter, and you would have more time to enjoy your betta. That is not to mention the general health of your fish would also improve.

Buying Guide 

Buying a new betta fish filter is always challenging, especially for beginners, because you have to keep a world of factors in mind. If you are also struggling with the same situation, our list below might be a great help. 

1. Size

We assume that everyone wants a filter with a perfect size for your tank, neither too small nor too big. Not only does it provide a suitable water flow, but it also leaves ample room for your lovely fish and decors.  

It is unnecessary to buy a more powerful betta fish filter than you need. The common sizes usually range between 5 and 20 gallons. It’s best to pick one with low or adjustable water flow.

Most of the product’s descriptions will indicate the filter’s size and say which tanks’ size is the most suitable. So, it is vital to check it out before buying one. 

2. Betta Fish Filter Design 

Among several filter designs, the top 4 popular ones are Canister filter, HOB filter, Sponge filter, and Undergravel filter. 

Canister Filter

In this design, the filter will suck the water out of the tank with a pump before bringing the water back into your tank via a filter media or a spillway. This system is also known as the external filters for betta fish aquariums.

Its most significant strength is that you can freely customize the inside media to fit your needs. The system is easy to clean and replace when necessary, completely hidden behind or below the tank for absolute aesthetics, and has high flow rates.

Hang On Back Filter (HOB Filter)

HOB filters help draw water out of fish tanks through biological, mechanical, and chemical filtration. As they are behind the tanks, HOB filters are easily accessible to maintain the media and not detract from your tanks’ available space or aesthetics.

Sponge Filter

As you can guess from its name, these filters draw water through a porous sponge filter, whose function is to offer both biological and mechanical filtration.

An outstanding point of sponge filters is that instead of a pressurized pump, an airstone generates the suction via the filter. That leads to an ideally gentle water flow for your betta fish. 

Moreover, sponge filters are considered the most inexpensive materials and do not require too much maintenance.

Undergravel Filter

The final design is the under gravel filters, which sit below the sand and draw water via the gravel before circulating it back to the top of the tank.

3. Characteristic Features

Flow Rate

The most vital feature for the betta filter should be how much water it will clean. That amount is measured in gallons for each hour. The ideal cycle frequency for your future filter models must be more than three times per hour for the whole betta tank.

Media Filter

There are three media filter types, including biological, mechanical, and chemical forms. The best filter for betta should use two or ideally, all three types above.

Noise Level

Betta fish cannot handle loud decibels; that is why a filter with low noise output should be your priority. And believe us, we are pretty sure that you also benefit a lot from low noise filters.

Easy to Use

Are you a beginner in keeping bettas? Don’t worry. There is no end to easy-to-use filters on the market, and that can be your savior. You can take it easy with a less sophisticated filter. Cleaning or operating will no longer require a lot of effort.

Top 10 Best Filter For Betta In 2021

There are a world of filters on the market, but these products below deserve to be The Top 10 for your Bettas. 

1. Tetra Internal Filter 25817 – Best Filter For Easy Change

Tetra Internal Filter 25817

Tetra Internal Filter 25817

[amazon fields = “B0002DHYG8” value = “button”]

If you seek a filter that will not disturb your betta, this Tetra Internal Filter 25817 is worth considering since it creates almost no noise when operating. 

More importantly, you don’t need to put the whole hand into the tank as the cleaning cartridges are easily accessible from the top. So if you want to clean the blade, remove it and get things done without any mess. 

That also makes this filter become one of the easiest systems for your aquariums. 

The only tiny drawback is that the low outflow cannot agitate water enough to create more oxygen. But you can handle it by adding an airstone.


  • Comes at reasonable prices
  • Compact and convenient design
  • Easy to use
  • Creates limited noise


  • Does not produce enough oxygen

2. AquaClear Tank Filter A595 – Best HOB filter

AquaClear Tank Filter A595

AquaClear Tank Filter A595

[amazon fields = “B000260FVG” value = “button”]

Another prominent opponent for the best filter for betta fish is AquaClear Tank Filter A595. It creates a plentiful amount of oxygen, so your betta will not have to take in oxygen from the surface.

It consistently cleans the water every hour to ensure the optimal cleanliness. But don’t be afraid that it will cost you a pretty penny. We guarantee that this is a cost-effective choice as it provides the lengthiest contact time between filter media and water. 

Unfortunately, due to its intake’s strong suction, we suggest you should buy a tiny sponge for your intake. 


  • Creates a lot of oxygen
  • Provides an ultimately pure water
  • Cost-effective
  • Quick and easy to set up


  • Pretty strong suction

3. Fluval Canister Filter HGA449NET – Best Filter For Durability

Fluval Canister Filter HGA449NET

Fluval Canister Filter HGA449NET

[amazon fields = “B07JFY2QW6” value = “button”]

Fluval has been notable for its cleaning reputation and durable design for over four decades, and this Fluval Canister Filter HGA449NET is not an exception. 

Made from sturdy materials, it will offer years of use, and the manufacturer also puts forward a warranty for three years to prove its credibility. 

This filter features a state-of-the-art engineering solution from the previous models, which delivers a 25% quieter and much smoother operation. 

More importantly, though coming with a powerful engine, it only consumes a small amount of energy. To be specific, this model only generates 10 W of electrical energy, which is comparable to a single LED in your house.

However, it still has a minor downside, which is its stiff hose. Many users want to replace it, but they end up continuing to use it because of the replacement’s pricey cost.


  • Energy-saving
  • Made of sturdy materials for superior durability
  • Delivers smoother and quieter operation


  • Exorbitant hose to replace

4. Lee’s Undergravel Filter 13160 – Best For Large-sized Tanks

Lee's Undergravel Filter 13160

Lee’s Undergravel Filter 13160

[amazon fields = “B0002APVAC” value = “button”]

If you own a big betta aquarium or tank up to 125 gallons, this Lee’s Undergravel Filter 13160 is a promising option you should not miss. 

It features a multi-layer plate that resists cracking or splitting. Its large plate also helps reduce the number of required plates, allowing spacious room for your fish.

Besides, there are four activated carbon cartridges; that is why biological filtration is also a perfect product for chemical filtration when necessary.

Customers have never hesitated to pay this Lee’s filter compliments in almost all aspects, except for its elbows design that generates frustrating bubbling sounds. 


  • Available in 125 gallons for aquariums and large tanks
  • Made of durable, split, and crack-resistant plastic
  • Comes with four activated carbon cartridges and riser tubes
  • User-friendly


  • Annoying bubbling sounds

View More: Best Filter For 10 Gallon Tank – Buying Guide And Top Picks

5. Aqua-Tech Aquarium Filter ML90740-00 – Best Filter For Ultra Pureness

Aqua-Tech Aquarium Filter ML90740-00

Aqua-Tech Aquarium Filter ML90740-00

[amazon fields = “B003JMTTL2” value = “button”]

Aqua-Tech Aquarium Filter ML90740-00 will be a great companion in keeping your water as clean as possible. It is all thanks to the BIO-Fiber, through which odors and small pieces of waste will be removed to get rid of toxic nitrites and ammonia from the water.

Moreover, it offers 3-stage filtration for ultimately fresh water and healthy betta fish. Both its filters and housing are extremely easy to clean and maintain. 

Unfortunately, several users have reported that compared to other same-sized products, this Aqua-tech model is much noisier. However, if you do not mind noisy sound, this filter with superior quality may be a dark horse you are longing for your aquarium’s success.


  • Powerful 3-stage filter for pure water and healthy bettas
  • Easy to clean
  • Cost-effective


  • Pretty noisy

6. MarineLand Penguin Filter PF0350B – Best For User-friendly Design

MarineLand Penguin Filter PF0350B

MarineLand Penguin Filter PF0350B

[amazon fields = “B0009IMDQM” value = “button”]

With the strong commitment of MarineLand, the Penguin 350 Power Filter delivers an easy and effective aquarium filtration with three stages. They consist of mechanical filtration, chemical filtration, and biological filtration to remove waste, odor, and discoloration. 

In particular, it comes with no air pumps, tubing, valves, or air stones, allowing you to use it hassle-free. The revolutionary rotating bio-wheel provides optimum wet/ dry biological filtration by thoroughly eliminating toxic nitrite and ammonia.

The system is easy to set up, which is even perfect for novice fish lovers. Once you have plugged it in, you can simply adjust the flow with the mid-level intake. 

Nevertheless, the intake tubes do not stay connected. They tend to fall out easily, which might potentially kill your fish if they get stuck. The bulky and big design is also not the taste of the majority of fish enthusiasts.


  • 3-stage filtration with rotating bio-wheel
  • Hassle-free use
  • 5 different sizes
  • Easy setup and operation
  • Adjustable mid-level intake


  • Intake tubes fall out easily
  • Bulky design

7. Fluval C3 Power Filter 14002 – Best Filter For The Most Filtration Stages

Fluval C3 Power Filter 14002

Fluval C3 Power Filter 14002

[amazon fields = “B003SJQJ46” value = “button”]

The Fluval C3 Power Filter is famous for creating outstanding water quality thanks to the superior 5-stage filtration. 

The first two mechanical filtrations and poly/ foam pads are vital for biological and chemical filtration. While the first one captures large particles, the second one featuring dense polyester traps fine debris.

The third stage of the activated carbon filter effectively eliminates undesired discoloration, odor, and impurities for crystal clear water. The fourth stage of bio-screen traps any leftover debris in intake water before it drips into the chamber. 

What makes the product superior to traditional filters is the last stage of C-Nodes. The new star shape offers better biological power and a larger surface, leading to a healthy environment for bettas.

Some delicate fish, such as betta, need a gentle water flow, which can be solved with Fluval refiltration. You can easily control and adjust the flow without reducing the efficiency of filtration.

However, many users have complained about the plastic outer material. It is so flimsy and breakable that it cracks whenever you do maintenance.


  • Advanced 5-stage filtration
  • Star-shaped C-nodes for better power and larger surface
  • Adjustable flow and refiltration


  • Flimsy and breakable plastic

8. Aqueon QuietFlow Aquarium Power Filter 100106117 – Best For High Flow Rates

Aqueon QuietFlow Aquarium Power Filter 100106117

Aqueon QuietFlow Aquarium Power Filter 100106117

[amazon fields = “B004W50KKY” value = “button”]

The Aqueon QuietFlow Power Filter 50 features a total of 4 filtration stages, including mechanical, biological, chemical, and a special pad to produce the clearest, cleanest, and healthiest water for your betta. 

The flow rates of Aqueon filters are relatively higher than those of other competitors on the market, resulting in a proper result of clean water and high dissolved oxygen water. 

The superior biological filter of the products has two grids. The first patented one with a larger surface supports more beneficial bacteria to remove nitrates and ammonia. The second wet/ dry one offers further filtration and oxygenations when the water comes back to the tank.

Another plus point for the product is no priming required when setting it up or restarting it after power interruptions or cleaning.

However, the filter makes quite loud grinding sounds so you can hear the noise from every corner of the house. Any fish lover in a modest room space or apartment should carefully consider this issue.


  • 4 filtration stages: mechanical, biological, chemical, and wet/dry pad
  • No priming required
  • LED indicators as a reminder to replace the filter cartridge


  • Loud noise when operating

9. Penn-Plax Cascade Filter CPF5 – Best Filter For Both Saltwater And Freshwater Tanks

Penn-Plax Cascade Filter CPF5

Penn-Plax Cascade Filter CPF5

[amazon fields = “B0002DJ82G” value = “button”]

The Penn-Plax Cascade Hang-on Aquarium Filter drives waters at 300 GPH, which works perfectly for aquariums up to 100 gallons. It is suitable for both saltwater and freshwater fish tanks.

The flow rate is adjustable with the knob, which comes in handy in feeding times. The hang-on design is also great for easy setup and safe mounting.

The filter uses disposable and double-sided cartridges with poly-fiber floss and activated carbon for optimum filtration of anaerobic bacteria. Meanwhile, the Bio-falls system improves water oxygenation and helps remove nitrate and ammonia.

The only drawback of the filter is that there is no way to change carbon without damaging the cartridges. A simpler design of the cartridge could make it perfect.


  • 300 GPH for super large aquariums
  • Adjustable flow rate
  • Simple hanging-on design
  • Excellent filtration of bacteria and water oxygenation


  • Cannot change carbon without cartridge damage

10. Tetra Whisper EX 70 Filter 26313 – Best At Removing Particles

Tetra Whisper EX 70 Filter 26313

Tetra Whisper EX 70 Filter 26313

[amazon fields = “B001CHVKPY” value = “button”]

Tetra Whisper EX 70 Filter features a filter carrier to remove any undesired drips and keep your hands clean. Unlike other products, this filter from Tetra pushes water through various floss densities to eliminate a high level of particles.

The inside carbon removes discoloration, impurities, and odors. Besides, the Bio-scrubber filters the toxic nitrites and ammonia to your fish.

In particular, with the Tetra Whisper filter, water in your fish tank can move continuously. This outflow of water optimizes oxygenation.

Though it is for fish tanks, the product can also be used for turtles. To do so, you want to ensure that the water level always stays above the minimum line, around 3 and 4 inches from the tank top.

This Tetra filter seems perfect, except for the non-adjustable flow rate. It is too strong to create actual waves through some small tanks and may disturb the substrate.


  • A cartridge carrier and numerous floss densities
  • A user-friendly design
  • Great filtration stages with Bio-scrubber
  • Excellent oxygenation for fish


  • Non-adjustable flow rate

Frequently Asked Questions (FAQs)

In this section, we will answer some buyers’ common questions. Hopefully, it will, to some extent, help you understand more about the best filter for betta.  

1. How Does A Betta Fish Filter Work?

A filter of the betta tank takes water and pushes it through filter media. An excellent product also generates oxygen for your betta. Once the processes are over, the now clean water returns to the betta tank.

It is better for filters to not create strong currents that betta will suffer from. Water might return either below or above the surface of the betta tank.

2. How Often Should I Get My Filter Cleaned And Maintained?

The filter helps reduce the frequency of your water changes, but it still needs to be cleaned periodically. 

We recommend you clean your filter and replace the pads or cartridges once a month. Nevertheless, it would be easier for you to do filter maintenance during water changes.

That is because cartridges and pads easily get clogged. And if they do, they might restrict or even block water movement, leading to less efficiency of your filter. 

In addition, the lack of frequent upkeep also increases the noise level your filter produces and potentially burns its motor. Therefore, you had better monitor your filtration system every week or every two weeks to detect unwanted problems.

3. Is There Any Way To Reduce The Water Current?

If the flow of your filter is too powerful, here are some methods to reduce it.

Firstly, try to adjust the flow rate if it allows. Though it is simple, you are still limited by the smallest rate of your filter.

Secondly, adjust the water intake with some tools. You can cut pantyhose and fit the piece over the intake tube to limit the water rate entering.

Thirdly, disperse the flow with a baffle. You can use anything as a baffle, such as a kitchen sponge or mesh screens, to block or slow down water from the outlet.

Finally, protect your betta from excessive flow by putting decorative logs, plants, or other items in the tank.

The Bottom Line

Well, our article about the best filter for betta is about to come to an end; but hopefully, it has answered all of your wonders. 

We have also summed up a list of top 10 promising betta filters for you if you still have no ideas which one is the most suitable. Despite some minor negative points, all of them are appreciated for high-quality performance and, therefore, will not let you down.

And don’t forget to check out our website GA Pet Sitters for more interesting information.

Thank you for reading!