Octopus DNWB 150 Recirculating Skimmer by CoralVue. **** PRODUCT MANUAL **** Specifications: * Allows the user to input the exact amount of water desired to be skimmed. * Requires a feed pump or plumbed from an overflow to inject water into skimmer. * Internal or External use. * Modified funnel neck design with bubble plate diffuser. * Rating: Up to 180 gallons. * Diameter = 6" * Dimensions: 12.6″ x 10.2″ x 25.6" * New pinwheel impeller increases the performance by 30%.