Macro-Zyme Pond Bacteria is the eco-friendly approach to reducing and reversing seasonal buildup of sludge in ponds and the associated nutrient levels and foul pond odors. With over 3 billion CFU’s per gram, once added, the bacteria quickly go to work consuming organic material such as grass clippings, animal waste, fertilizer and chemical waste, dead plant material, and other pond-bottom accumulations. If this organic material is left untreated, it will begin to fill in your pond and can create poor living conditions for fish and other pond inhabitants. It can also cause excessive aquatic plant growth. By adding Macro-Zyme every 3 weeks when water temperatures are above 55deg F (and with pH levels 5.5-8.5) you can experience a rapid reduction in foul pond odor and the decrease in nutrient-rich, organic material at the bottom of your pond. Macro-Zyme is a facultative anaerobic bacteria, so it works with or without oxygen. However, it is up to 5 times faster if adequate oxygen is present, so it is perfect with any Kasco aeration or fountain equipment Treatment Capacity (gal.): 162,825, Working Temperature: 55-110 F, Environmentally Friendly: Yes, Compatible With: 1/2 acre-ft. pond, Includes (qty.): (1) Packet