Aqua UV 25W 3/4 inch Classic UV Sterilizer w/ Wiper The Classic Series UV's are ideal for ponds, aquariums, and water features. The Classic's rugged design has features that allow for quick installation and easy maintenance. 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. Fresh Water Sterilizer: 500-1,200 gallons; Flowrate - 1,200 gph for 30,000 µw/cm2 Fresh Water Clarifier: up to 4,000 gallons; ideal for water gardens Salt Water Sterilizer: up to 150 gallons; Flowrate - 400gph for 90,000 µw/cm2 Dimensions: 26.25" X 4" X 2.5" Inlet: 3/4" barb or FPT, Outlet: 3/4" barb or FPT Available in white only. Lightweight Unit Weighs: 5 lbsAqua UV Wiper:Always the leader in technology, Aqua Ultraviolet sets the industry standard again with its optional wiper system. With a simple push-pull operation once a week, your sterilizer can run at the optimal efficiency allowing for maximum UV transmission which destroys harmful bacteria and protozoa along with unsightly algae. No disassembly required Wiper keeps UV working at optimal performance No harmful cleaning agents needed Highest quality stainless steel rod Can be used in saltwater applications Housing: Limited lifetime warranty on housing against Ultraviolet degradationComplete Unit: One year from date of purchase or 18 months from manufacturing date What is a Sterilizer? A sterilizer will eliminate green water and control bacteria. The Classic 25 Watt, will sterilize up to 1,200 gallons of fresh water or 150 gallons of salt water. What is a Clarifier? Used as a Clarifier the Classic 25 Watt, will control green water in a freshwater environment of up to 4,000 gallons that has 50% to 75% plant coverage and partial shade. What works best for Marine Tanks? In marine fish tanks (No reef or live rock) a flow rate matching those shown in the 75,000 or 90