Fluval Sea Mini Protein Skimmer, 5 20 Gallon, Black, 14324

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 and water effectively to remove organic waste from water molecules