The Aqua Ultraviolet Advantage Series UV Clarifiers are ideal for small ponds, aquariums, and water features. The slim-designed, lightweight design of this ultraviolet sterilizer gives versatile usage and maximum effectiveness. Aqua Ultraviolet UV clarifiers 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 instructions. SKU UPC Code Description Clarifying Capacity Sterilizing Capacity A00266 617750002668 Advantage 8W, Barb x Barb 1500 gallons Freshwater: Max 200 gallons (Max 642gph) Saltwater: Max 70 gallons (Max 214gph) A00285 617750002859 Advantage 8W, Hanger A00267 617750002675 Advantage 15W, Barb x Barb 2000 gallons Freshwater: Max 500 gallons (Max 700gph) Saltwater: Max 75 gallons (Max 233gph) A00286 617750002866 Advantage 15W, Hanger Instructions Hanger Dimensions Barb Dimensions