hygger Aquarium Double Sponge Filter, Comes with 2 Spare Sponges (S)

Works absolutely amazing! I could not get the algae growth under control while running just a charcoal filter. After 2 weeks as the good bacteria grew in the sponges, the algae was gone almost immediately. It takes a week or two because that’s how long it takes for the good bacteria that gets rid of the ammonia and nitrite to grow. Plus my plecostomus fish behind it as a hiding place during the day!

This is honestly a great aquarium filter. I used to be a canister filter and HOB user but decided to simplify my fishkeeping. I currently have 4 of the larger one in a 40 gallon breeder with three 3” fancy goldfish. Setup was easy and straightforward. I switched out the bioballs it came with and used seeded ceramic rings. To really maximize the filters I used a 16 watt, 475 gph air pump. My parameters are perfect at 0 ammonia, 0 nitrite, and 20 nitrate. I also use this filter with fritzyme 7. Water is clean, beneficial bacteria are happy, and my fish and I are happy.

Seems pretty good so far. Sponge filters provide the best biological filtration for aquariums. My main concern was the air discharge. This is for a tank in my living room and I didn't want the sound of large bubbles- was it free flowing and loud or did it produce bubbles like an air stone would. Turns out it's like an air stone. Very quiet. It comes with extra sponges. Not sure if I'll ever need them but it's nice to have in case I do...

I loved mine and I’m about to buy another because they work great. However when cleaning mine must have gotten damaged because it no longer shoots air out maybe a bubble or two a minute leaks out the top where it use to be a constant stream. I also want to add I have a 15 gallon cube full of shrimp and snails and these filters require almost every 2 month cleanings. The sponges need to be squeezed out or you will notice lack of bubbling because not enough water is passing through

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.

Looks cool, good material, comes with bio balls and back up sponges, the most important thing is the noise from the bubbles from the outlet is well controlled. Well done Hygger, hope bigger size can be produced more.

Love these sponge filters. Easy to clean and replace. Just make sure you get proper size as medium is just a little too big if you have the small filter.

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

Exact replacement for my filter!

I just ordered my second one to replace my other outside of tank filter. I LOVE this unit. Super quiet, easy to install and the fish don't even notice. Highly recommend