As one of the Reef Octopus Classic Series skimmers, this NWB-110 will provide great performance for well stocked aquariums up to 75 gallons. It is constructed from high quality cast acrylic, o-ring sealed union pump mount, bubble diffuser top not craftsmanship powered by the Hailea OTP pumps. The skimmer bodies are built with high quality acrylic. The skimmer has a gate valve which allows for more precise control of water level. The collection cup has a quick release neck for easy removal for cleaning. It requires 1/2 inch of clearance to remove the cup. All Reef Octopus skimmers uses high grade metric plumbing parts.