TetraPond® Pond Sludge Removal Blocks with Clear-Zyme™ Technology Size:4 Count it provides supplemental aeration which

it provides supplemental aeration which improves the quality of pond water and its inhabitants

After 8-24 hours

Not compatible with Adirondack or New Hope style lawn chairs

2 year warranty

TetraPond® Pond Sludge Removal Blocks with Clear-Zyme™ Technology Size:4 Count it provides supplemental aeration whichTetraPond Pond Sludge Reducer with Clear Zyme Technology contains billions of beneficial bacteria and enzymes that quickly break down the unsightly wastes that accumulate on the bottom of ponds as a sludge layer. Sludge Reducer blocks are also ideal when setting up a new pond and during the spring start up and fall shut down of established ponds. The blend of bacteria and enzymes is beneficial for developing and maintaining the pond's biological