As one of the Reef Octopus Classic Series skimmers, this 110-EXT is a recirculating external protein skimmer that will provide great performance with the enhanced control for marine aquariums up to 130 gallons. The Classic 110-EXT is handcrafted of high-quality cast acrylic, o-ring sealed union pump mount, bubble diffuser with the performance provided by the efficient Reef Octopus Aquatrance 1000s Skimmer Recirculation Pump. The skimmer features a recirculation mounted pump with a precision gate valve for optimizing the water level within the protein skimmer. The collection cup has a quick release neck for easy removal for cleaning. For aquariums up to 130 gallons. Small Footprint: 10.4″ x 9.25″ | Body Diameter: 5″ | Height: 22.8″. Equipped with Aquatrance 1000s feed pump (7w, 240 gph). Churn style fluidization. Bubble Diffusing Chamber. Oversized Air Silencer for quiet operation. Collection Cup with flow directional guide, drain and unit venting. Precision Control with the easy to turn output flow valve. Effective Venturi Air Injection System.