Fluval Sea Mini Protein Skimmer, 5-20 Gallon, Black, 14324 (6-Piece Set)Brand: Fluval Color: Black Features: 32 needle wheel impeller increases air to water contact ratio, creating ideal bubble size for maximum protein collection Adjustable flow regulators control amount of air entering reaction chamber to produce perfect amount of "skimmate" Adjustable water level control valve regulates skimming performance Versatile mounting options adjustable hanging bracket and suction cups included Large reaction chamber mixes air