recommended from 20 to 140 liters (5.3 to 37 USgal.) of sea water. Immersion depth: approx. 135 to 155 mm (5.3 to 6.1 in.) Skimmer cup volume: 0.2 liters (.05 USgal.) Air capacity: approx. 100 l/h (26 USgal./h) Energy consumption: 2.5 W, 230V/50Hz (115V/60Hz) Dimensions (L x W x H): 110 x 63 x 215 mm (4.3 x 2.5 x 8.5 in.) Includes Magnet Holder for glass thickness of up to 10 mm (3/8").