Jebao CF-10 Pressured Pond Bio Filter with 13W UVC Clarifier Dual Filtration System to provide a Clearer and Healthier Pond or Water Garden Cleans Ponds up to 1000 Gallons Recommend for use with Pond Pumps Capable of Pumping between 850 to 1250 Gallons of Water per Hour Inlet/Outlet Size: 1/2", 3/4", 1" (recommend use 1" hose) Backwash Feature