Huijukon Double Super Biochemical Sponge Filter Air Powered Filter for Aquarium Fish Tank[Product Information]- Sponge filters provide both mechanical and biological filtration -- Works great，easy to clean (squeeze in tank water)， keeps water cycled and clear.
- Simply install an airline into the unit and provide both aeration and filtration for your fish
- Aerobic bacteria colonize the sponge providing a bacterial substance to facilitate the nitrogen cycle
- The filter is therefore the best choice for specific application for raising Discus， Angel Fish and other fish
- Environmentally friendly and filter operation is no noise【Tank Size up to 35 Gallons】
