BUBBLE MAGUS Protein Skimmer are practical and highly efficient. These protein skimmers offer innovative features along with reliable pumps at an affordable price: which makes them a great value. The CURVE series skimmer has all the right features to make a great skimmer. These features include:a needle wheel pump with a venturi intake that produces just the right amount and size of air bubbles, a bubble plate to reduce the turbulence in the reaction chamber, a innovative `curve` skimmer body that allow the foam to smoothly rise to the collection cup, an air silencer to ensure quiet operation, a quick-release collection cup and skimmer body for easy cleaning, a collection cup drain to reduce maintenance frequency, and lastly, a compact footprint that allows easy installation. Features Extreme performance with high quality needle wheel impeller Collection cup is extremely easy to remove and replace for simple cleaning / maintenance Made with top quality cast acrylic Air intake silencer for the needle wheel pump included Specification Model: Curve 9 Pump: ROCK SP4000 Power: 20w Air Intake: 900 L/H Size: 235 x 295 x 600mm (LWH) Suitable Tank Size: 900-15000 liter