Laguna PowerFlo High Efficiency Water Fall Filtration System, 5000-Gallon Filtration begins with the built-in spray bar that oxygenates pond water 4 threaded bulkheads in spillway to allow additional waterfalls, pond equipment Filter falls can be combined with skimmer filter system for ponds Measures 35-inch length by 22-inch height by 22-1/2-inch width