Healthy Ponds Pond Cleaner Refills — 300 Gallons, Model# 10188

For use with floating lily or submersible dispenser. Healthy Ponds pond cleaner is the natural nonchemical solution that treats the real problem of ponds and lakes: excess nutrients. Keep your water clean and clear with this patented time-released system. Meters daily doses of bacteria and enzymes to reduce unsightly algae blooms and sludge. Safe for humans, pets, fish and plants. Cannot overdose. Great for ponds, water gardens and fountains. 300-gallon, 4-pk. refill. 120-day duration.