Aqua-One Dry Sludge Remover Remove sludge from your pond- without the use of toxic chemicals. Naturally improves the balance of an aquatic eco-system by reducing or eliminating organic sludge buildup. Increases pond water clarity. Gets rid of odors typically associated with sludge buildup Sludge REMOVER consists of a special blend of beneficial bacteria. Naturally occurring microbes use nitrogen and phosphorous as a food source- eliminating excess nutrients that cause low-quality water problems. The microbes in Sludge REMOVER help improve pond and aquarium water clarity. Chemical free and non-toxic. Completely safe for aquatic life- wont harm fish or other living beings. Sludge REMOVER has no odor and is not a chemical.