High-performance REEF-SPEC? Skimmers feature a combination of PSK pumps with proportionally sized venturi, bubble diffusor and reaction body that optimizes air-water contact time for steady waste removal. Designed with hobbyists needs in mind, the REEFER? Skimmers are really quiet thanks to rubber connectors which dampen the vibrations as well as a robust air silencer. With features like the FoamView? window, built-in neck cleaner and extra-long valved waste tube, we guarantee an enhanced home reef filtration experience.