AQUANEAT Aquarium Bio Sponge Filter Breeding Fry Betta Shrimp Nano Fish Tank, 3pcs (Large up to 60Gal)

First, it is a good idea to mod these to use an internal air stone. Use snips of some kind (like small side-cutters) to cut space on the inside, then attach a small air stone (0.6" cylinder worked for my "small" sized filter) inside the filter from the cap using the tubing. Doing this will make the filter create finer bubbles, providing better filtration and less water surface disturbance. It will also quiet the bubbling from the filters down quite a bit.Sponge filters are great all-round filters, and work well for fish that don't like movement (like Bettas). You need an air pump and airline tubing to use them, though. They won't flood the ground around the tank like other types of filters, and they don't really break (air pumps do, though). They are a little unsightly and harder to hide than some hang-on-back filters, but not impossible.This particular sponge filter is about as good as any other, with some caveats. Some aquarium experts recommend larger, open-cell sponges for their filters, which will clog up less than the fine closed-cell sponge on this filter. Because of this design, you will need to clean this filter more often than you otherwise might need to. It does work, though.Also, this filter is not quite weighted as much as it should be. Even when fully soaked, it's a little too buoyant. A good sponge filter should sit comfortably on the bottom of the tank.Do not ever replace the sponge, by the way. To clean it, you pull it out of the tank and squeeze it out gently in the old tank water during a water change. The sponge may last years, and will harbor beneficial bacteria for your tank. If you replace it, you will mess your tank up. To replace a filter with another, you want to run the old one alongside the new one for a least a few weeks to help the bacteria colonize the new one.

Great value for the money. I put two in my ten gallon tank, and my toddler stole the other to sing to (because it looks like a microphone)They look great in the aquarium, and are doing a great job of keeping the water Crystal clear.

I finally decided to upgrade to a sponge because the one I have got from Walmart really was not doing the job. This one does a job faster than the one I got from Walmart! my tank looks pretty clear. It practically worked instantly.

These are a good deal for 3 of these filters. I only needed to use 1, but it’s good to know that I have 2 extra.For me the bubbles were just too big and ended up causing too much turbulence on the surface of the water in my tank. I just didn’t like how it was doing that. Of course it could’ve been perfectly fine for the fish. In addition to how those bubbles looked, as they erupted through the surface of the water, it was loud as well.Basically I ended up going to Petco and buying those small cylindrical air stones. It just so happened these fit perfectly in the inner cylinder of these sponge filters. You have to disassemble the sponge filter bottom part. Then you’ll see supports that look like spokes, which support a center tube. You’ll have to cut those supports with something. Then use pliers to pull the center tube out. It’s just held by friction. Then put the airstone in. Mine fit too loose but I noticed that the airstone’s tubing was tapered, so I simply cut offa few millimeters off the top. This was enough for it to have a good contact and I just pushed it in as firmly as possible. When you reassemble you might have to cut off the original end tube connector a bit so it’ll fit with the airstone. After I did this mod, the bubbles are much smaller and the noise level is way down. In my book, now it’s perfect!

I have a 20 long split in to 4 sections and have these three sponge filters in the tank in different sections. It is a nice size in the 5 gallon tank and does good job of keeping the tank clean and filtered without being too large or too strong for my betta fish. I am new to sponge filters and so far love them - they are very easy to use and way more affordable than hang on the back filters.

These are perfect & work exactly like you’d want!

These are small, weighted to prevent floating, and the perfect size for a ten gallon aquarium. The price was a great value and they are easy to install. I bought extras hoping I could modify them and add air stones, but they're probably too small to fit the airstones I'm trying to use. I'm not disappointed - these are simple, easy to clean and great to use for a healthy tank!

I got sick of buying expensive sponge filters and thought they seemed so simple they shouldn’t cost that much!! Then I found these and they work like a charm and they’re affordable! Will absolutely be buying a ton more

Bien pour une 2gallon apeupres trop petit pour une 5 gallon à mon avi . Un brin déçu je m'attendais qui serai un peut plus gros

Will get more

delivered quickly, good price and the product was as advertised