CORALIFE (Energy Savers) Pond Life 9 Watt Pond Turbo Twist 3x UV Clarifier Treats up to 2000 Gallons Specifications: KILLS ALGAE >> CLEAR WATER SOLUTION ! Maximum pump is up to 600 gph Sterilizer, 900 gph Clarifier. Recommended pump size is 200-500 gph. Manufacturer Maximum Tank Size: 2000 gallon pond Inlet/Outlet: 5/8" Diameter Bulb Wattage : 9w Compact PL Dimensions: 13.75"x7.88"x3.25" The Pondlife Turbo-Twist Pond UV Clarifier is the most efficient device for clarifying ponds on the market today. The Pondlife Turbo-Twist Pond UV Clarifier treats and produces crystal-clear pond water, free of algal blooms. The revolutionary spiral-flow design inside the Turbo-Twist provides substantially more UV exposure time than conventional designs which allow the water to shortcut down one side of the unit. POND KING RECOMMENDED !! The superior features engineered into the Pondlife Turbo-Twist Pond UV Clarifier allow it to outperform traditional units much larger in size while using much less energy. The Turbo-Twist is an efficient tool for eliminating the suspended algae which is responsible for green water. The Pondlife Turbo-Twist Pond UV Clarifier is easy to set up and operate.