... porosity and usage. Concretely,it can be used in filtering,dustproofing,dedusting and adsorbing,etc.Filter sponge also named ... of sponge and activated carbon with 35%-80% carbon content. It can be used to remove foul and peculiar ... appliances, aquarium, autos and motors, sewage and petroleum treatment for filtering, protecting, decorating, straining, cleaning and others.For more informations ...