The Advantage Series is ideal for small ponds, aquariums, and water features. Advantage UV's are slim, lightweight units designed for maximum UV effectiveness. 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. UV Specs: 8 watts output, 3/4_ barbs inlet/outlet, 12 __ x 4_ x 2 __ dimension, 8_ cord length. As a UV Clarifier: 1500 gallons max pond size, 1000 gph max pump flow rate. As a UV sterilizer: 5200 gallons, 642 gph max pump flow rate.