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These high-quality sponge filters are excellent for breeding tanks, fry tanks or fish aquariums. They utilize a hydrophilic sponge that creates an environment for cultivating a high density of nitrifying bacteria. Designed to operate with air, they provide excellent mechanical and biological filtration.
Four Models Available:
- Oxygen 1, up to 25 gal.
- Oxygen 2, up to 50 gal.
- Oxygen 4, up to 75 gal.
- Oxygen 5, up to 30 gal.
Questions on Azoo Oxygen Sponge Filters
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not all it seems to be Review by George
Not exactly what I expected...the sponge is too big. It is too big for an aquarium 12" front to back(55 gal.) I expected it to be the same size for all models AND model #5 seems not to be available. Your products need more description to avoid confusion...Flourish excel can be confused to be a fertilizer when it is a conditioner or water treatment. (Posted on 10/22/2014)
Great filters Review by GDP
I ordered two of these about a month ago and both are great. I happened upon this website while doing a search for sponge filters and took a shot with these. I bought the #5s for my 20G long tank which works out perfectly in terms of height, (which is adjustable for taller tanks), flow, and filtering. I received these very quickly and in good packaging. Oh and I don't think it mentions in the description these come with a second replacement sponge inside. Not sure if that's for all sizes or just #5 though. (Posted on 8/30/2011)