Check the listing for details. Aqua Ultraviolet Viper Series 400 Watt UV Clarifiers - Large-Scale Applications. Condition: New. Listed at 2887.00 USD. The Viper Series UV’s are ideal for large commercial or residential ponds, aquariums, and water features. The specially designed 400 Watt lamps disinfect faster and have greater cell penetration capability. The compact body design has a small footprint making it easy to handle, install and maintain. Vipers are engineered to accommodate extreme flow rates; minimum water flows must be maintained at 95 GPM. A flow switch, provided, shuts the unit off if flows fall below 95 GPM. Aqua Ultraviolet UV’s will clear your water in 3 to 5 days sometimes overnight and keep it that way. Performance is guaranteed when sized, installed and operated according to our instructions.Used as a Clarifier the Viper 400 Watt, will control green water in a freshwater environment of up to 50,000 gallons that has 50% to 75% plant coverage and partial shade.A sterilizer will eliminate green water and control bacteria. The Viper 400 Watt, will sterilize up to 30,000 gallons of fresh water or 3,600 gallons of saltwater (stainless steel units not suitable for saltwater). SpecificationsMinimum Flow Rate95 Gallons per minutePower Specifications60 HzFeatures Benefits14 Month Lamp Life is Longest on the Market Fewer replacements and cost savingsHighest Quality Hard Quartz Protects UV lamp and ensures optimum UV transmissionClear Cap Makes it easy to see if lamp is on and workingBuilt-In Flow Switch Shuts off lamp if flow rate falls below minimum 95 GPMEasy to install and maintain