Armed with new Seltz pumps and Rotormix impellers, the Hydor Performer 700 Protein Skimmer provides exceptional water circulation and foam production, effective removal of particulate matter, high air concentration in the main chamber, notably quiet and energy efficient operation. Elegant and easy to use, the Performer series is built with high precision CNC machined parts made with top quality materials for safe and versatile applications in both marine and reef aquariums. The Performer 700 is rated for normally stocked aquariums up to 238 gallons in size, and heavily stocked aquariums up to 185 gallons. (22.8" in height, 9.4" x 13.8" footprint)