Reef Octopus® BH1000 HOB skimmer with external 1000 pump Dimensions: 8" x 3.25" x 17" Rated up to 100 gallons Powered by 1 OTP 1000 pump at 250 gph Wattage: 13w Air draw: 180 L/H (6-7 SCFH) High performance venturi air injection system Pinwheel Impeller 1 year warranty on skimmer and pump The BH-1000 is a unique design HOB skimmer in that the pump is mounted external and under the actual skimmer body allowing for much less room needed behind the aquarium. Also by placing the pump outside the skimmer and the aquarium there is no heat exchanged to the water. This design also allows for easy removal of the pump for cleaning and maintenance. The Reef Octopus® skimmers are powered by the Hailea OTP pumps. They are built with high quality acrylic. The Octopus skimmers uses metric plumbing parts. The pump has an improved venturi design and pinwheel impeller.