The Aquascape Signature Series 6000 Bio Falls Filter with 3 x 9D; Bulkheads is ideal for use in ponds up to 6,000 gallons, providing efficient mechanical and biological filtration. Its durable, rotationally-molded, rounded polyethylene shape maximizes structural strength while making it easier to camouflage into your landscape. Able to handle flow rates up to 15,000 gallons per hour, The Aquascape Signature Series 6000 Bio Falls Filter includes our patented non-cross-threading screws and reversible 28 Inch x 9D; waterfall spillway lip, providing the option of installing a natural stone spillway. The included rock and plant tray can hold rocks, plants, and gravel, helping to naturalize the Bio Falls into the surrounding area. The Aquascape Signature Series 6000 Bio Falls Filter is easy to install and comes complete with fish safe silicone, hardware, dual 3 x 9D; Inch bulkhead ports, necessary fittings, media nets, and two Poly-Flo ESA Biological Filter Mats, providing 50% more surface area than traditional filter mats. Aquascape is passionate about ponds, water features and gardening, providing unique products, designs, and features that stand above the competition.