... filtration,it use the air-driven system to create suction,that allows the sponge to capture floating particles in the ... from air pump and consumes lowest wattage.The illustrate to Use:1.Before use,soak the Bio-foam ... Bio-Foam,do squeeze the foam in the water to remove all trapped air bubbles.This will keep ... 4.Suggest replacing the bio-foam every 6 month,to ensure the filtering effect as well as the ...