Tips Self-Contained Pond Kits Sludge Removers Sludge is created at the bottom of a pond from debris that blows into it, plants that decay, fish food that decomposes, and other organic waste materials that are the byproducts of a cycling ecosystem.
Enzymes speed up the decomposition process.
Use when water quality drops due to heavy bio-loading. Particularly useful to oxidize built up winter sludge. Safe in all water gardens and ponds. POLY OX must not be used on systems less than 30 days old. There must be enough organic matter either dissolved or suspended in the water to necessitate treatment.