Muck Digester Tab - 4 lb (64 tbs)Muck Digester Farm Pond Treatment are one ounce dissolvable blocks convenient for treating farm ponds. They are effective for treating the bottom of ponds with a slow release of five beneficial bacteria. Contains only 100% safe, natural ingredients. No harmful binding agents or chemicals used! Eliminates Muck, Sludge, Decay and Murky Water Breaks down animal waste and reduces odor from decay Reduces toxic ammonia nitrate and phosphate Safe for fish,