CRYSTALCLEAR® SPRING & FALL PREP

Designed to replenish winter bacterial loss and accelerate decomposition of organics with a "burst" of cool water natural bacteria and barley. Easy-to-use pre-measured water soluable packets. Safe for all aquatic life. Apply weekly during spring start-up and fall closing when water temperatures are between 4 C / 40 F and 10 C/ 50 F.