XY-2820 Practical Aquarium Biochemical Sponge Filter

* Designed and constrcuted with quality materials, multilayer principle and the largest surface area possible with no clogging.
* Sponge material is easy to clean.
* Filters are diesnged and contructed for quiet operation.
* Air diffusion chamber produces minute and large number of air bubbles which increases the oxygen solubility in water.