Kasco Macro-Zyme Muck Block, 6 lb. block (MPN MZMB5)

Macro-Zyme is an effective solution for controlling and eliminating sludge and foul odors in tanks, ponds, and lakes. Once applied, Macro-Zyme releases billions of beneficial bacteria and enzymes that work continuously to clear, neutralize, and purify the water. This concentrated formula, which has been trusted by professionals since 1991, was the first to introduce a 1-step maintenance program that uses natural bacteria and enzymes to rapidly break down top and bottom sludge, preventing its buildup in ponds of any size. In addition, Macro-Zyme also helps reduce nitrates and phosphates. The bacteria in Macro-Zyme and Macro-Zyme+ are capable of reducing odors in less than 24 hours, removing dead grass, leaves, paper, fish waste, and sludge, as well as improving water clarity and restoring a healthy oxygen level. For those interested in the Macro-Zyme Muck Block, here are some details: it is a 6 lb. block that can treat an area of up to 6 acre-feet. Reapplication is recommended every 30 days. This product is suitable for medium to large ponds and feeder streams.