... filter media Filter sponge including air filter sponge,activated carbon filter sponge,air filter sponge,air-condition filter sponge,aquarium filter sponge,ceramic filter sponge ... equipment, house wares and so on.It's divided into beginning effect filter sponge,amid effect filter sponge and ... activated carbon with froth carrier into air purification filter media. Activated carbon is made of sponge and ...