PROFESSIONAL POND TECHNOLOGY - the unique 7 stage filter process has been specifically created to provide a beautifully clear and healthy pond with a minimum of maintenance CREATE SPECTACULAR WATERFALLS – this powerful filter has 4 outlets, use 2, 3 or 4 outlets capable of handling high flow rates for spectacular waterfalls and larger pond filtration requirements PROVIDES OXYGEN-RICH WATER – the venturi oxygenation chamber adds bubbling oxygen-rich water to the filter, creating the ideal environment for friendly bacteria that keep ponds healthy ALGAE FREE, CLEAR WATER – the built-in clarifier UVC light ensures algae free clear water for better enjoyment of your pond and its inhabitants EASY MAINTENANCE – large hinged lid for easy access, lift out Hydroscreen stainless steel pre-filter to trap large particles, 3 grades of open cell foam to trap dead algae, dirt and waste, ceramic bio media supports large populations of friendly bacteria, replaceable polymer wool pad polishes the water and carbon impregnated foam removes chemical pollutants