The Laguna Power Flow Filter Falls oxygenates pond water through a spray bar, mechanically filters the water as it passes through 3 hanging brush filters and mechanical filter media pad and finally biological filtration through Biospheres. This pond filter features a spillway for starting a high volume waterfall. Uses 1½" hose. Good for ponds up to 5000 gallons. 2000 to 3000 gph pump recommended (not included). Measures 33” (L) x 20” (W) x 20” (H). Can be combined with a Power Flo Skimmer Filter to increase capacity up to 10,000 gallons (larger pump may be required).