How Many Sponge Filters For Different Gallon Tanks: 101 Review

Sponge Filters For Different Gallon Tanks

While setting up an aquarium, one might think about what filter to use for the tank. It can be a common question if someone is new to it. But don’t worry, because we are here with the answer.

So, how many sponge filters for different gallon tanks?

We ought to get a filter that is a bit bigger than we need. Let’s say there are 2 filters, and one of them says it’s appropriate for tanks holding 10 to 30 gallons. The other states that it is appropriate for tanks containing 20 to 40 gallons. If so, it is always best to choose the larger one.

You still might be a little unsure about this matter. Don’t be concerned because this whole article is about sponge filters. Let’s dig right in!

What Is A Sponge Filter?

Sponge filters have existed for almost as long as maintaining aquariums. However, a lot of aquarium owners either don’t know what they’re used for or don’t care. 

Sponge filters aren’t ideal for every tank, but there are several instances where they are. They are available in a range of sizes and forms. 

They may be modified to meet various filtering demands. It’s because they have a range of pore diameters. There are several ways to power them. Including powerheads, air pumps, or even a different kind of filter.

When gentle and safe filtering is required, sponge filters work great. Because baby fish could be pulled into the intake of common filters. Fish species that don’t perform well in high currents include bettas. 

Additionally, sponge filters help them. Another species that requires extremely delicate filtering as opposed to a robust intake is shrimp. Considering that would draw them in.

Sponge Filters For Different Gallon Tanks

What Is The Tank Requirement For Sponge Filters? 

There are four distinct sizes of sponge filters for aquariums. For 5 gallons and more, it’s called a nano filter. For 10 gallons and more, it’s a small filter. Medium filters are 20 gallons and more. Large ones are the 40 gallons or more filters.

We advise acquiring a filter that is a little larger than what we require. There are 2 filters and one of them claims to be suitable for 10-30 gallon tanks. The other claims it is suitable for tanks between 20 and 40 gallons. If so, the bigger one is always preferable.

A little bigger sponge provides more room for good bacteria to flourish. Additionally, the tank will be pumped with more air.

10-Gallon Tank

For various tank sizes, the Aqua Clear fish tank filter is offered. Its 5-20 gallon rating means that our 10-gallon aquarium may use it as well. So one filter is more than enough for a 10-gallon tank.

Due to the various filter media, this filter delivers multi-stage filtration. It has a ceramic filter as well as a sponge filter with activated carbon. This delivers filtering that is mechanical, biological, and chemical.

Multi-stage filtration is used here and the operation is silent. It also provides longer water contact with filter media.

20-Gallon Tank

We can use a Hygger Double Sponge Filter for your 20-gallon tank. It is suitable for 10 to 20-gallon tanks. This filter features two sponges. Also, the chamber that houses the ceramic filter media is located at the bottom of each sponge.

By adding this filter media, the population of bacteria in the tank is given a boost. Cycling time and inconvenience are significantly reduced.

This filter cannot have a diffuser added to it. The bubbles that are erupting from the spout are somewhat noisy. But if we change the spout’s position, the bubbles will emerge above the water. 

So, the noise is much decreased. Also, aquarium water can be disposed of timely to fix this. A single filter will easily do all the jobs.

30-Gallon Tank 

For a 30-gallon tank, the Hydro-Sponge III is really good. For 20 to 30-gallon tanks, it is a perfect size. The large sponge filter is sizable and cylindrical. Additionally, a transparent lift tube and a weighted heel keep the sponge off the tank floor. 

Since this filter is free-standing, a tank wall is not required to support it. We can set it wherever in the tank because of the weighted foot. Because of this, it will remain put. This sponge filter may be quite noisy on its own. 

40-Gallon Tank

You can get an Aqua Tech Ultra-Quiet Power Filter for your 40-gallon tank. On touch, this filter’s Bio-Foam biological filtration eliminates hazardous ammonia and nitrites. The motor is disconnected, and dampeners keep the noise level below 40 dB. 

The impeller and motor combination was made to use power effectively. 20 to 40-gallon aquariums may be filtered by it five times every hour.

55-Gallon Tank

Aqua Tech Power filter can be used for a 55-gallon tank. This filter is suitable for 30 to 60-gallon tanks. It has an advanced three-step filtration process. 

The variety of sizes gives us a lot of choices. It captures dirt, clears pollutants, and maximizes water interaction with carbon. 

We can also add two 20 to 30-gallon filters for a 55-gallon tank. But in most cases, it is easier to use one filter. It takes up less space and the setup is easier. A Hydro-Sponge III can be used for that.

75-Gallon Tank

An Aqueon Quiteflow LED Pro is more than adequate for 75 gallons. Even a 90-gallon tank may utilize this. Two new cartridges are needed for this sponge. When water cannot travel through the cartridges, the led indicator flashes. Its interior structure is also ideal for muffling noises. These are the best sponge filters on the market.

If we wish to add more than one filter, that can be done. Two Aqua Tech Power filters will be more than enough in this case. We just have to make sure to not go overboard.   

How Does A Sponge Filter Clean An Aquarium?

By capturing aquatic debris, sponge filters purify aquarium water. Clean water is then filtered and returned to the tank. Air is fed into the filter by airline tubing. Doing so creates bubbles and fills the sponge’s hollow center. 

The sponge is helped by these bubbles to absorb water. It drags it upward from the filter’s top and into the tube. The tiny air bubbles that are also created aid in boosting oxygen solubility.

The porous surface of the sponge catches trash as it draws water through it. Clean water is discharged when it passes through the top filter. The sponge removes dirt from the water, leaving it crystal-clear and clean.

Actually, it’s a relatively easy and inexpensive approach to keeping harmful substances out of the water. Additionally, any organisms beneficial to aquariums can survive and develop on the sponge. You can also add fish after cleaning the water.

How To Set Up A Sponge Filter?

There are several things we’ll need before setting up a sponge filter. It begins with a sponge filter. Verify that it is appropriate for your tank. We will then require an air pump. We have to make sure it has sufficient power for our tank. 

After that, airline tubing will be required. It must be the appropriate size for the filter model we are using. An airflow valve is the last. It regulates the flow of air through the filter.

After we have all the necessary things, we can start to assemble them. Single sponge filters ought to include a weighted base and an extension that may be removed. A plastic tube with perforations along the edges will be placed on top of this. 

The object will fit within the sponge. The airline tube may be slotted into an additional component that may be attached to the top. An uplift tube may also be used in the filter to improve water flow. This may be shortened to fit the depth of our fish tank or is optional.

Next, secure the airline hose’s other end to the filter. The appropriate-sized tube will properly fit onto a little extrusion. Then secure the air pump’s opposite end. 

Carefully insert any airflow or stopper valves we have into the tubing that connects the pump. The airflow valve on the side nearest to the pump must also be filtered.

It’s possible that compressing the filter will aid in water absorption. This can happen when we add it to the tank. Although bases are weighted, for a while our filter could float. After installing the pre-filter sponge, switch on the air pump and adjust the airflow as necessary.


How To Make Sponge Filter Bubbles Smaller?

The air from the air pump is diffused into smaller bubbles in the water. It’s done by an attachment called an air stone. The sponge filter’s inside should be filled with an air stone, as recommended. It minimizes the bubbling noise and increases the effectiveness of the filter.

How To Use Sponge Filter Without Air Pump?

Without a pump, creating an aquarium filter is simple and enjoyable. We can employ the bottle filter approach rather than a sponge filter. To accomplish this correctly, there are angled filters and aquarium siphons as well. This may also be accomplished with bio-wheel filters and bubbling filters.

How Frequently Should A Sponge Filter In An Aquarium Be Replaced?

It is advised to replace filter sponges every six months. However, if they are cleaned frequently, sponges may be used again until they cease working.


Now we know the answer to how many sponge filters for different gallon tanks. It always depends on how big our tank is. We should always pick the appropriate filter for our tank. It will give us the maximum output.

Have fun putting up the filter!