Fairmount Minerals Pool Filter Sand #20 Grade Silica Sand - 50 lbs Ecologically safe sand does not solidify and will help prevent clogging and channeling 100% natural sand is chemical free and backwashes easily and evenly Filters out insects, leaves, oils, dirt, dust, hair and algae from pool water Odorless, premium #20 grade swimming pool sand filter media Does not stain and ensures easy maintenance at a lower cost