Savio Skimmer Filter Combo Unit with 8.5" Faceplate Assembly SS0085 Skimmer Filtration removes up to 85% of debris before it sinks 8.5" Faceplate Assembly included skims 1,800 - 5,000 Gallons Per Hour Provides skimming action for ponds up to 500 sq ft. Comes with two biological filtration pads Add an Ultraviolet Clarifier (not included) for optimum water quality