Little Giant 517424 UVC9 UV Clarifier, 9-Watt

Clarify to 810 gallons Sterilize to 540 gallons of total pond Up to 1,000 gallon pond Re-designed for space saving Comes with 18-foot cord Introducing U.V. Clarifiers to your system will give you the best possible water clarity. As algae passes through the unit, the U.V. light bleaches chlorophyll from the plant. The chlorophyll then sticks together and lodges into the biological filter to decompose. It then turns into nutrients and is consumed by beneficial bacteria that renders the nutrients harmless to pond life.