CrystalClear MuckOut tablets contain highly concentrated natural bacteria and enzymes. This formulation is great for pond and lake muck removal along shorelines, docks, or beaches. CrystalClear MuckOut can also be used as a total pond and lake treatment to remove up to 2 inches of muck per month. Distribute evenly from shore or in a body of water once every two weeks when water temperatures are above 50°F. 24 pounds treats up to 1 surface acre for 3 months.