Find The Right Sponge Filter For Your Betta Or Other Small Fish

One of the simplest and most dependable filtration systems you can acquire for your setup, regardless of whether you are unfamiliar with the world of underwater pets or you have been riding this wave for a long time.

Sponge filters will just be your filter of selection if you require something simple and efficient, and this is something we have learned after spending a lot of time investigating, testing, and analyzing many filters.

In either case, even the most seasoned aquarists require some input from other experts. Depending on your setup’s requirements, you will find many recommendations; nonetheless, the filters we recommend are one of the best filters out there.

How Do Sponge Filters Work?

A sponge is a kind of tank filter that collects dirt and debris using a layer of porous sponge. The sponge is put in a cylinder that has aquarium water inside of it.

The sponge, which holds any solid substance in its pores, is passed through by the water as it moves through the chamber. Although they can be used in saltwater aquariums, sponge filters are mainly employed in freshwater aquariums.


Using a sponge filter has a number of benefits over other filter types, including power filters as well as canister filters. Unlike other types of filters, sponge filters are very simple to maintain and do not need to be cleaned frequently.

These sponges do not produce a great deal of noise or vibration, and they are also quite gentle on fragile fish and shrimp. Sponge filters are also relatively affordable, making them a fantastic choice for aquarists on a tight budget.

In addition to keeping the water clean, this effective filtration system significantly lessens the amount of effort required to sustain a healthy aquarium. Sponge filters can also be used in a variety of aquariums, from little fish tanks to huge reef systems, and they are quite adaptable.

What Are The Functions Of A Sponge Filter?

The sponge filter is a sort of mechanical filtration system that traps particles using a porous sponge. Because they offer both filtration and aeration, sponge filters are frequently used in aquariums. How do these cutting-edge sponge filters function?

The sponge serves as a biofilter by giving nitrifying bacteria a place to flourish. These bacteria turn ammonia into nitrites, which are significantly less hazardous to fish, and ultimately into nitrates. The sponge filter also performs mechanical filtering, catching bigger waste particles. Water gets oxygenated as it passes through the sponge, giving fish and other aquatic life essential aeration.

In addition to keeping the water clean, this effective filtration system significantly lessens the amount of time it takes to keep a healthy aquarium. Sponge filters can also be used in a variety of aquariums, from little fish tanks to huge reef systems, and they are quite adaptable.

What Is A Sponge Filter’s Efficiency?

Because they are very inexpensive and simple to maintain, sponge filters are really a popular option for aquariums. However, how well do they filter water? Water is drawn into sponge filters through a number of pores or holes. After that, the water flows through a covering of spongy material that collects trash and debris.

The aquarium then receives the filtered water once more. Small waste particles, such as unconsumed food and fish feces, are best captured by sponge filters. They are less efficient in getting rid of dissolved pollutants like ammonia and nitrites.

Sponge filters are consequently frequently used in combination with other filtration techniques, such as chemical filtering or mechanical filtration. Overall, sponge filtration can be a useful tool for maintaining clear, clean aquarium water.

Since sponge filters offer both filtration and aeration, they are frequently employed in freshwater aquariums. Alternatively, they can also be utilized in saltwater tanks as long as they are cleaned frequently to avoid the growth of bacteria and algae.

Can Betta Fish Use Sponge Filters?

Sponge filters are, in fact, excellent for betta fish. They are the kind of filter that is most frequently advised for use in betta fish tanks. The sponge filter does have a bad reputation as an ugly filter that does not provide enough filtering for most aquariums. The sponge filter is unquestionably one of the best filtrations you can purchase for betta fish. However, that could be true in specific situations.

Of all the filters, the sponge filter is the easiest to use and understand. The most popular consumers are little, delicate fish like the Betta. Following breeding, its gentle performance is especially suitable for freshly born fry. It will be helpful if you need to set up a nursing tank because your fish is sick. To pull water through a sponge filter and capture particles, use an air pump.

Why Should Betta Fish Aquariums Use Sponge Filters?

Sponge filters are a great option for planted tanks since they remove far less Greenhouse gas from the water compared to HOB or Canister filters. Your vegetation will benefit if you increase the quantity of CO2 that is available to them.

The current produced by sponge filters when using an air stone is significantly softer. Small, delicate species such as betta fish, fish fry, and freshwater shrimp are examples of how well they may survive in this setting.

In many cases, sponge filters may offer much greater biological filtration. Along with HOB filters, sponge filters could also serve as a pre-filter. This prolongs the lifespan of the HOB’s filter cartridges and prevents large particles from entering the canister.

Main Benefits Of Using A Sponge Filter For Your Betta.

  • Sponge filters are a wonderful option if you are thinking about installing a planted tank since they eliminate far less Carbon dioxide from water compared to HOB or Canister filters. More CO2 accessible to your plants will benefit them.
  • If employing an air stone, sponge filters offer a much more mild current. This is excellent for delicate little animals like Betta fish, fish fritters, or freshwater shrimp.
  • Sponge filters frequently offer substantially greater levels of biological filtration.
  • As a pre-filter, sponge filters may also be used with HOB filters. This makes it easier to prevent big particles from getting into the HOB canisters and prolongs the life of the HOB’s filter cartridges.

The Sponge Filter’s Only Two Drawbacks

  • The appearance of sponge filters is obviously a drawback! It is recommended to try to conceal them behind several rocks or another décor if they are really obnoxious or large.
  • Their absence of chemical filtration, which is normally accomplished via the use of material like activated carbon, is another disadvantage.

However, as was already said, you can, when medicating your fish, tie a bag of carbon to a sponge.

Buying Guide For The Best Sponge Filter For Betta

You should feel confident that you are selecting the best sponge filter for betta when making this decision. The most crucial step is learning well about the product before purchasing it. It can be challenging to evaluate the best option at the correct time when there are so many possibilities available.

Check out the purchase guide to eliminate all the difficulty in locating your ideal answer.

The following characteristics define the ideal filter for a betta:

  • A slow output or current that allows fish to unwind and swim freely inside the tank.
  • A quick-to-remove cartridge system allows the filtering medium to be changed individually and as needed.
  • Will the filter be capable of performing its function, considering the size of your tank, in terms of removal performance? Will it be able to effectively cycle the aquarium and get rid of trash and undesired chemicals?
  • Does the filter media have different types of media? In some circumstances, having mechanical, biological, and chemical media is preferable. In other situations, having just one or two is preferable (such as for optimum plant development). Below, we go into greater depth about this.

Other important things to consider:

Features Of The Betta Sponge Filter

The features of any product should be examined initially. You must identify the elements that are practical for your needs. Sometimes a product will have a ton of features to make it look attractive to untrained eyes, but those features may be useless in actual use.

Therefore, you must assess the characteristics of the feature area and the description part to determine whether you will utilize them or not before selecting the appropriate item. You may surely choose the products if they have some effective qualities.

Look Over The Specifications

Sometimes we are compelled to buy a product without taking the time to review the specification section. Despite the fact that the items we are recommending are the best ones, we nevertheless advise looking at the specifications.

The sponge filter for betta’s specifications will tell you of the benefits and uses of the product. After that, you can decide if that will serve your demands.

Yes, if the specification part is too extensive, there may be some difficulties in understanding it all. We advise looking at the main characteristics, functionality, projected cost, and post-purchase support of the products.

Product’s Design

It can be difficult to choose from the many amazing items on the market. However, the item’s overall appearance gives the best first impression.

To gain a sense of the maker, look at the product’s fabric, texture, color, and other aesthetic elements. Before selecting the item, you can look at other aspects if you appreciate the overall design.

Seller Position In The Market

Checking the seller rank should be one of your considerations if you plan to purchase anything from our table of shortlisted products. A product that is popular and in demand indicates that it satisfies the majority of its clients.

Better trends and growth in sales also translate into higher seller rankings. Furthermore, purchasing a sponge filter for a betta from a reputable provider will guarantee not only high product quality but also superior after-sale support and, if offered, warranty support.

Product Stability And Durability

To find out how reliable and robust the product is, read the specification and reviews section. A quality product will be robust, have a longer shelf life, and offer consistent uses over the course of its lifespan.

The sponge filter for a betta that we have recommended is generally constructed to endure longer while delivering steady performance in use. However, the best thing to do is click the item and examine its durability and stability in accordance with your particular needs.

Customer Service And Comfort

Nobody wants to use a product and feel uncomfortable and harsh. One of the most crucial factors to take into account when selecting the sponge filter for a betta is comfort. The majority of the items included in this article have a large user base, making them popular.

We are confident that these goods will please the majority of clients because they are both comfortable and user-friendly. However, you may check out each item on our list to discover which most satisfies your needs.

Review Of The Best Sponge Filters

It is time to choose the best sponge filters now that you are more knowledgeable about them and how to use them in your system. There is a choice for everyone, independent of tank size or price demands, since we have studied and compiled a list of the finest sponge filters.

Hygger Double Sponge Filter For Aquariums

If you want to maintain your fish tank clean and easy to use, the Hygger Aquarium Double Sponge Filtration is ideal. This filter is superior to others on the market in terms of quietness and delicateness, making it ideal for any fish tank, whether it is a little betta and shrimp aquarium or a huge tropical fish tank.

This filter employs mechanical filtration, biological filtration, and air pockets from an air pump (does not include) to promote the growth of beneficial bacteria that eliminate ammonium, nitrites, and other pollutants from your tank while also supplying oxygen for healthier plants and fish.

The double sponge filter’s design enables twice as many good bacteria to flourish on either side of the filter media, which results in twice as much water oxygenation. This kind of filter is so easy to put up that almost anyone can do it without any prior knowledge in a matter of minutes!

You can buy it from here!


  • 2-sponge construction
  • enormous surface area
  • includes biofilter media balls
  • substitute filter media
  • increases water intake, conserves energy, and is quiet.
  • renowned and well-known brand


  • absence of an air pump

High-Density Foam Filter With Bacto-Surge From Hikari

The largest of the many sizes available for this sponge filter can easily handle aquariums up to 125 gallons in size. The very absorbent, polyether microfiber sponges will manage it just well and stay doing it for quite a long, regardless of the ecology or whether it is freshwater or saltwater.

Additionally, it will be simple to maintain and clean up. The delivery included a whole bundle. For one of our team members, who had previously ordered one for himself, this was not the case. They had to search for several missing parts after reporting them missing (not essential pieces).

The setup is simple up to the last phase. We quickly realized that maintaining the sponge filter’s submergence would be difficult. The removal of the oxygen from the foam required some time and effort. For that to occur, we had to rinse it numerous times properly. While it was sunken, it became a focal point that was visible to everybody.

You can buy it from here.


  • fantastic for freshwater and marine
  • flowing with force
  • grows beneficial bacteria
  • renowned and well-known brand
  • simple to clean
  • Increased longevity thanks to polyether 


  • Because the sponge likes to float, it might be difficult to keep it immersed.
  • hefty and large
  • no air pump

Hydro-Sponge Filter from Aquarium Technology, Inc.

Due to its effectiveness when used, this product is among the top of its genre and is a consumer favorite. One of the most adaptable solutions on our list, it is available in 5 sizes, including 10, 20, 40, 80, and sometimes even 125 gallons, particularly in light of the fact that it may be positioned both horizontally and vertically, providing it more positioning freedom.

It does not need to be affixed to the tank’s walls, so you may place it wherever you choose in your tank. Since this filter might make a little noise from bubbles striking the top, similar to when water is boiling, you might want to use it with a CO2 diffuser.

The substance used to make the sponge can endure repeated washings and strong water currents, enabling the finest mechanical filtration. Occasionally, there can be elements missing that make it impossible to put everything up properly. Another issue we discovered is that it needs to be cleaned frequently since the foamy gas gets blocked, and the sponge starts to float unless cleansed.

You can buy it here.


  • Direct connection to a tank powerhead is possible.
  • Diffusers can take the place of air stones.
  • Easily put together
  • does not need cartridge replacements all the time
  • easy to clean
  • is available in several sizes and may be positioned either horizontally or vertically.


  • tough to sink
  • Easily clogs and needs frequent cleaning
  • No air pump is provided.

Bio Sponge Filter For Aquariums By Aquaneat

The ideal filter for Bettas is this little sponge filter since it takes up little room but yet has an adequate surface area for good bacteria. This little filter can not be used with a CO2 extractor because of its size; therefore, you can anticipate that it will be noisier than a filter of a bigger size at roughly 60 decibels with no practical method for making it quieter.

The filter is supposed to be sturdy thanks to a heavy foundation on the bottom of the device, but you should still take care to prevent it from moving while the air is running. Due to its size, this item is very simple to conceal with vegetation or other tank ornaments.

Instead of using a powerhead with this filter, since it would likely cause an additional problem because it is so light, we advise using an air pump. It works well as a filter for any Betta fish aquarium when coupled with an air pump.

You can buy it here.


  • an increase in the surface area for good bacteria
  • Simple to evade
  • increased oxygen exchange
  • Biological and mechanical filtering
  • Good corner design for a variety of sizes
  • Simple to immerse


  • inadequate for heavy tanks
  • The delivery is missing several components.
  • Larger bubbles are created, which might harm marine life.

Biochemical Sponge Filter From Lefunpets

This edge design will be an excellent addition to your tiny tank if you’ve had a Ten-gallon fish tank. It is simple to construct and disassemble, making maintenance and cleaning simple.

This sponge filtration works better with an ear stone. Therefore it is an excellent idea to add one to enhance its capacity. It usually rises to the surface for a few nights before sinking and remaining there. Given that the sponge contains a deep foam, it encourages the growth of good microorganisms. However, it is readily clogged. It will be simple to handle and ideal for tiny tanks.

You can buy it here.


  • Conserves space and is simple to maintain and dismantle
  • increases the growth of bacteria


  • requires a second purchase
  • Works best on smaller tanks only.
  • For a few days, the sponge will 

Why Are Bubbles Emerging From the Sponge’s Side?

Several factors might be at play, so try double-checking the following:

  • Did you cut the lift tube down or get rid of it? Some air may escape through a narrower lift tube because there is less suction to force bubbles up the central column.
  • Is the sponge filter’s internal air stone bent? You might need to cut the tube connecting the air stone towards the bullseye shorter so that it hangs more straight.
  • Does the air pump’s pressure produce too much air? Excess bubbles may seep out the edges of the sponge filter if a lot of air is pumped into it.

Cleaning a Sponge Filter

Certainly, a sponge filter aids in cleaning your tank, but it functions more or less like a garbage can that must be periodically emptied. As the foam becomes filled up with debris, we advise washing your spongy filter once a month or anytime you notice a decrease in bubbles.

  • From the filter, take out the sponge.
  • Put the sponge in warm water to rinse it.
  • Any extra water should be squeezed out of the sponge.
  • Put the sponge in a basin with a solution of diluted bleach (1 part bleach to 10 parts water).
  • Give the sponge 10 minutes to soak.
  • Use fresh water to completely rinse the sponge.
  • Any extra water should be squeezed out of the sponge.
  • Reinstall the sponge in the filter.

Every 2-4 weeks, or as necessary, repeat this treatment.

Your sponge filter has to be kept clean because if it gets clogged, it isn’t going to be able to filter the water in your aquarium effectively. As a result, your fish may experience foggy water and even hazardous situations. It is crucial to routinely wash your sponge filter because of this. Your aquarium water will remain clean and hygienic with the aid of a clean sponge filter, which will perform better than one that has not been cleaned.


Does A Betta Fish Benefit From A Sponge Filter?

When gentle and safe filtration is required, for instance, in a fry aquarium where newborn fish could be dragged into the input of regular filters, sponge filters are ideal. Sponge filters are particularly beneficial for fish species like bettas that do not survive in strong currents.

Can I Put A Sponge Filtration System In My Tank All By Itself?

Yes, the sponge filter aids in cleaning your tank, but it functions more or less like a garbage can that must be periodically emptied. Once a month, or anytime you notice a drop in bubbles, is when we advise cleaning your sponge filter.

A Betta Fish Can Survive Without A Filter For How Long?

Since they are fairly resilient, bettas are less susceptible to water changes than other aquarium fish. They may also be housed in containers without the need for a filter or heating devices in pet stores, where they can still thrive for three to four weeks.

Does A Sponge Filter Have Oxygen In It?

By enhancing the exchange of gasses that takes place at the water’s surface, sponge filters increase the amount of oxygen in an aquarium. This occurs because the overall surface area between both the liquid and atmosphere increases as a result of the popping bubbles.


Sponge filters are among the most well-liked aquarium filter models available right now, and for a good reason. Excellent filtration is provided by sponge filters, which are also quite simple to maintain.

Sponge filters are also incredibly adaptable and may be utilized in a wide range of various aquarium configurations. The ability of sponge filters to effectively remove trash and debris from the surrounding water is one of its key advantages.

Additionally excellent in oxygenating the water and preserving good water quality are sponge filters. Sponge filters also have the advantages of being affordable and simple to set up.