Check the listing for details. UltraClear? Muck Digester Tablets by ABI Inc.. Condition: New. Listed at 29.99 USD. UltraClear® Muck Digester reduces undesirable muck, eliminates organic build-up, reduces bottom sludge and improves water quality. These convenient, dissolvable 1oz tablets make it easy to treat ponds and lakes. The slow-release tablets unleash 9 strains of beneficial bacteria to attack pond sludge! No chemicals or harmful ingredients - just 100% natural, safe bacteria. Since these tablets work in low-oxygen environments (such as the pond floor), they are great solutions for treating municipal ponds, farm ponds, industrial lagoons, ands commercial or residential ponds and lakes!Reduces muck, organic sediment, and sludge build-upReduces nitrates and phosphates that cause murky waterBreaks down animal waste and removes toxic ammoniaCan be used all year long - even in cold weather!Reduces unpleasant odorsApplication Instructions Distribute tablets across surface of pond or lake, spreading as evenly as possible. For small ponds, use one tablet per 1000 gallons every 2-4 weeks. For large ponds and lakes, use 64 tablets per surface area (16 per quarter acre), assuming an average depth of 4 feet.