Kasco Marine Macro-Zyme Pond Bacteria - Case of 40 8-Oz. Pks., Model# MZ8C 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