Hygger Pack of 4 Sponges for Aquarium Double Sponge Filter (M)

I was originally using the filter that came with my 5 gallon aquarium but I hated how the flow of it whipped my betta around when he swam near it and having to replace the filters regularly since they fell apart easily. I tried using a sponge filter in that to reduce waste and the flow rate but a biofilm formed at the water surface from lack of flow from the filter. I read online how these type of sponge filters are ideal specially for bettas so I bought this filter along with the Hygger air pump. It was easy to set up and while it takes up some room in the tank it works SO much better than the original tank filter. It's fairly quiet, the flow is gentle and doesn't whip my betta around, the water is crystal clear and no biofilm on the surface. I just rinse the sponge in old aquarium water after siphoning every month or so after 6 months it's still in great shape. I like that it came with a replacement sponge but I have a feeling it'll be a while before I have to replace it.

this filter fit perfectly in my 5.5 gal tank (16Lx8Wx10H). i've noticed it has cleared up my tank a little bit in a couple of hours so i'll wait a couple of days and update.but for now, the filter arrived just like advertised and in good condition. it didn't have any chemical smell. i rinsed the items in hot water first for maybe 20 seconds, then cold (to cool the stuff down) then i floated the sponge in my grandma's 55 gal tank since it already has good bacteria.the filter was easy to install and the suction cups work well. the filter also has a gentle flow that patelito can swim in. also you literally won't hear it except for the very every small trinkling of the water depending on how u put up filter.for now i am satisfied but we'll see.

This review includes tips for the extra sponges!!!I have had 3 of these for over a year and highly recommend them. I have all size smalls and use them on 5 gal, 8gal, 10gal tanks filled with mostly shrimp and snails and a few fish. They work great and they require little to no maintenance. They easily come apart if you do need to clean or maintain and there are no moving pieces to worry about breaking with wear and tear. They come with the bio balls and an extra set of sponges.They don't require a lot of air, so I'm able to use a splitter on each air pump to also power bubblers. They are completely quiet depending on what level you place the output spout compared to water level. Shrimp and snails love them because they are safe havens to rest on full of yummy things to eat. They cause little to no motion of the water if you have inhabitants that like things calm. And they there is zero risk of having a filter accidentally suck up a baby of any species.The black sponge blends in well with the background and the only part that actually sticks up and shows out of the tank is the tiny clear airline hose.In over a year. I've yet to come anywhere close to needing to replace the sponges, however they have come in handy:1. When cycling a new aquarium, I bought another of these and swapped out one of the towers (balls and foam) from an existing aquarium with a new one. I did this with two different tanks. This had little to no impact on the established tanks since I only took half of the filter media. It got the new tank to cycle almost immediately.2. To keep from vacuuming up tiny fish fry during water changes, I use one of the spare sponges on the end of the siphon hose (1/2"). It won't suction up debris with it on, but it works great for water changes in a heavily planted tank where I let the plants handle the debris.3. (Sort of a spin off of 1 and 2). If you have multiple tanks and are worried about cross contamination, store one of the extra sponges in the back of the tank. Use this if you need to spin off an emergency bin for any reason, and/or when changing water on that specific tank.

Product arrived per order and on time, very happy with the service!

Have this filter in a 10 gallon tank. Compared to the Aquaneat sponge filter in my 6 gallon aquarium, it's quite noisy. The outlet pipe produces large bubbles, in comparison. The filter could be improved if there were a way to modify it with an air stone. The large bubbles also make the water surface a little splashy, wetting floating plants, which can cause some rot problems. This might be a plus if you have unwanted duckweed! Duckweed doesn't appreciate surface agitation.