Biological filter for medium to large ponds up to 2000 gallons. Includes a five step valve, optional internal UV clarifiers for clean, clear water, non-corrosive construction for longevity. For medium and large ponds up to 2000 gallons. UV resistant, for use above or below ground. Size is Medium. Dimensions are 16 X 16 X 22 20 X 16 X16 , Approximate Flow Rate Of 1000 Gph. UPC Code = 029753753001
