Pond Block Offers an easy, effective way to control and prevent the growth of algae. Leaves pond water crystal clear. Helps keep pond clear from algae when used regularly. Pond block is not recommended for lilies or hyacinths.
Pond Clear-Zyme This bio-active cleaning block keeps water cleaner and clearer by breaking down wastes which accumulate on the bottom of ponds as a sludge layer. Also great to use during the setup of a new pond and the spring start-up or fall shut-down of established ponds. The blend of safe bacteria and enzymes helps develop and maintain the pond's natural biological balance.
Treats 250 gal
