Xinyou XY-2820/2821/2822/2830/2831 Bio Sponge Filter (Tube)

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. Take Note: Before using, soak the sponge in the aquarium water for five minutes to increase nitrobacterias formation. Rise/clean the sponge using aquarium water instead of hot/warm water.