TetraPond® dependable UV clarifiers use ultraviolet light to destroy the reproductive activity of suspended single-cell algae, resulting in clear, green-free water.
Dead algae then clump together into particles large enough to be removed by filtration, leaving the pond cleaner and clearer. GreenFree Clarifiers usually remove heavy algae blooms within eight days and keep water clear and green-free.
UV Bulb (made by Phillips) Effective for 11 months of continuous operation.