Aquatop Classic Aqua Flow CAF-10 Sponge Filter - Up to 10 Gallon Aquarium Filter

The CAF-10 is a simple classic and economical sponge filter for beginner and advanced aquarists alike. The specially developed foam materials of each CAF sponge filter supports the colonization of bacteria allowing for mechanical and biological filtration. The process breaks down harmful ammonia and nitrite material resulting in a cleaner living environment for your fish.