Easy-to-install professional quality biological waterfall filter Create a beautiful water feature while providing superior biological filtration Innovative BioVort "up-flow" technology optimize bio-filter performance Professional waterfall filter for healthy pond environments and beautiful cascading water features. Unique filtration system directs water up through the special Matala biological filter pads to efficiently process waste and purify water. Features BioVort, a vortex separator plate that breaks up debris to maintain even water flow and reduce filter maintenance. Constructed of high-density polyethylene and corrugated wall design for extra strength and lasting use. Large waterfall chamber houses biological filter pads and mesh filter media bag for custom filtration options. Molded bottom inlet for easy installation. Optional Lid, sold separately, keeps debris out of Waterfall Vault. Includes: Waterfall vault, drawstring mesh filter media bag, filter pads, BioVort, BioVort support plate, artificial rock, band clamp, screw, washer, and wing nut. Waterfall Features: BioVort technology for even water distribution through filter pads State-of-the-art Matala biological filter pads Stainless steel band clamp for easy liner attachment Back flush port for easy maintenance and removal of settled material Artificial spillway rock Model Dimensions For Ponds Up To Pumps Size F1000 25" diameter x 26-1/2" H 3000 gallons 1000-3000 gph F5000 31-1/2" diameter x 26-1/2" H 5000 gallons 3000-5000 gph Downloadable WaterMark Series Waterfall Filter Instructions PDF . (Requires Adobe Acrobat Reader 4.0 or later - get it here for free ) Please click on "More Information" for installation instructions.