"Kasco Marine Macro-Zyme Pond Bacteria is the green approach to reducing and reversing the seasonal buildup of sludge in ponds and the associated nutrient levels and odors. Macrozyme bacteria eat the grass clippings, leaves, animal waste and fertilizer and lawn chemicals that accumulates as organic sludge on the bottom of your ponds. This reduces nutrient loads and odors and improves water clarity. U.S.A. Compatible With Large ponds, Includes qty. 1 25-lb. container, Material Type Bacteria, enzymes, Treatment Capacity gal. 162,825 8oz. measure. Increases decomposition, removes sludge, reduces odors, clears water and helps restore healthy oxygen levels Non-pathogenic and non-toxic, safe for humans, wildlife, and livestock Dry product is highly concentrated and is easy to ship, store, and apply No objectionable odors, no irrigation restrictions, no permit needed to apply Farm ponds, water gardens, retention ponds, wastewater lagoons, septic systems, irrigation ponds, and swimming ponds/recreational areas all benefit from Macrozyme Comes in a resealable bucket Dosage is 1 pound per acre-foot one acre, one foot deep or in smaller systems 1 ounce per thousand gallons"