Reef Octopus® BH300 Dual HOB skimmer Dimensions: 11.5" x 3.75" x 18" Rated up to 135 gallons Powered by 2 OTP 1000 pumps Wattage: 26w total Air Draw: 180 L/H (6-7 SCFH) per pump High performance venturi air injection system 1 year warranty on skimmer body and pump The BH-300 is a dual pump model that follows the same design pattern as the BH-100 but has two pumps. The pumps are mounted externally so it will sit inside the aquarium. This is a simple user friendly HOB skimmer designed to skim up to a 135 gallon aquarium. Simply place the skimmer on the back of the aquarium, mount the pumps in place as the instructions list and it is ready to skim. This HOB Reef Octopus skimmer is powered by two Hailea OTP 1000 pumps and are built with high quality acrylic.