Walex Bio-Pak Natural Enzyme Holding Tank Deodorizer And Waste Digester - 50-Pack. Bio-Paks rapidly break don waste and paper. Features a non-staining Everblue color. Pre-packaged portion control - no spills Features of Walex BIOBLUBG Bio-Pak Natural Enzyme Holding Tank Deodorizer And Waste Digester - 50-Pack Advanced enzyme system removes odors Environmentally friendly Rapidly breaks down waste and paper Non-staining Everblue color Pre-packaged portion control - No spills Package Contents: Walex BIOBLUBG Bio-Pak Natural Enzyme Holding Tank Deodorizer And Waste Digester - 50-Pack Walex BIOBLUBG: Bio-Pak Natural Enzyme Holding Tank Deodorizer And Waste Digester - 50-Pack