Macro-zyme Pond Bacteria for Muck, Sludge, Odor - Qty: 8 Packets Cleans and purifies the water. Increases decomposition and helps remove sludge, muck, silt, fish waste and decaying organic buildup Helps to remove nitrates and phosphates from the water Removes fish waste, Muck, Sludge, Odors 1 step maintenance program - Each packet will treat up to 1/2 acre-ft. (8,000 gallons) Non-pathogenic and non-toxic, safe for humans, wildlife, and livestock