The Aquascape Signature Series 1000 BioFalls® Filter is perfect for ponds up to 1,000 gallons, providing efficient biological and mechanical filtration. With a flow rate of up to 3,000 gallons per hour, its rotationally molded, rounded polyethylene shape offers maximum structural strength while blending easily into your landscape. Includes 15" waterfall spillway lip and patented non-cross threading screws. Optional rock tray to hold rocks, plants, and gravel. Easy to install.