Check the listing for details. AquaUltraviolet Classic Inline UV Sterilizer 40 Watt 2" Socket Black. Condition: New. Listed at 627.35 USD. The Aqua Ultraviolet Classic 40 Watt Black 2" UV Sterilizer is the premium choice as a clarifier and sterilizer in ponds and aquariums. Used as a sterilizer, the Classic 40 Watt UV is the premium choice for a 1200-2000 gallon pond or an aquarium up to 325 gallons. Used as a clarifier, the Classic 40 Watt can treat up to 6,000 gallons of fresh water that has 50% to 75% plant coverage. A pump is a required. For proper flow rates for your application consult the Installation Manual. Dimensions: 36-7/8" X 6" X 2-3/8" Inlet: 2” slip, Outlet: 2” slip Black Housing: Limited lifetime warranty on housing against Ultraviolet degradation. Complete Unit: One year from date of purchase or 18 months from manufacturing date Controls algae, bacteria & protozoa Clears water in 3-5 days, sometimes overnight