The Seaclone Protein Skimmer utilizes the forces of nature to effectively draw wastes out of your aquarium. The tornado-like motion inside the Seaclone Protein Skimmer removes organic wastes from your aquarium. The Seaclone has been developed and tested in different aquarium environments. As a result, its design is simple and user-friendly. Seaclone requires no airstones and is more efficient than air-driven protein skimmers. The Seaclone has a versatile dual design - it functions as either an external hang-on or an internal sump model. A Maxi-Jet Powerhead Aquarium Pump is included with each Seaclone Protein Skimmer. Design features include; new snap fittings for greater reliability, easier cleaning new molded return spout for added unit support. Air injector securely bracketed in optimum position above water level - for quick, easy, precise adjustment. Good for saltwater aquariums up to 100 gallons.