2-10 Days Model: BF1600 Item: 73934 Waterfall Width: 16" Spillway Pump Flow Range: 1,000-3,900 gph Bulkhead: 1½" Pond Volume: up to 1,250 gal Match To Skimmer: PS3900 Warranty: Lifetime (enclosure) Dimensions: 21½"W x 19½"D x 17¾"H Biomechanical filters remove suspended solids, convert toxic ammonia and nitrites to harmless nitrates and aerate the pond Atlantic's FilterFalls are designed to be able to expand filter capacity as ponds age and fish grow Efficient removal of toxins and floating particles from the water column improves water quality and clarity Oversized chamber contains more media material to start with, accepts additional filtration when needed and accommodates more choices of filtration media Overhanging weir with drip edge eliminates leaking due to silicone seal failure Multiple bulkhead locations allow maximum versatility in plumbing FilterFalls Reinforced body prevents warping and deformation for years of worry-free service Support bars accommodate heavier stone and gravel for ease in camouflaging FilterFalls includes installation kit, male thread adapter and one-piece liner flange Product Manual