Bioscape Super Bio-Foam Filters are suitable for most fish or fry tanks. These air driven sponge filters are multi-layered to give the best possible filtration and yet gentle enough not to create too much turbulence. Bio-Foam can be removed, rinsed and re-used. To be used in conjuction with an air pump connection for best results. Suitable for discus, small tropical fishes, shrimp or fry tanks. Multi-layered to give the best possible filtration and yet gentle enough not to create too much turbulence.