• Works well mechanically and biologically. • Includes mechanical and biological filter media for complete pond filtration • Produces 14½ (37 cm) wide waterfall. • Solid, professional grade fiberglass construction. • Textured shell is easily camouflaged. • 4 inch lip eliminates the need for screw in brackets, making installation easier. • Can be installed in or above ground • For ponds up to 1 000 US Gal. (4500 L). The Laguna PowerFalls Filter Spillway is a simple, easy-to-use filter that can be used as a beginning to a waterfall. It provides the ultimate water management solution for small to medium sized ponds (up to 1000 US Gal./4500 L) and comes complete with mechancial and biological filter media. With its solid, professional grade construction, the PowerFalls Filter Spillway produces a 14 ½" (37 cm) wide waterfall.