Tunze 9410 Skimmer Recommended for aquariums up to 1,000 litres (264 USgal.) of salt water. Immersion depth of 140 to 240 mm (5.5 to 9.4 in.) Dimensions without post-filter: L 250 x W 180 x H 415 mm (L 9.8 x W 7.0 x H 16.3 in.), 230 V / 50 Hz, 12 W Water flow rate: 900 l/h (237.7 USgal./h) (115 V / 60 Hz, 16 W Water flow rate: 264 USgal./h) Air output: 600 l/h (158 USgal./h), Skimmer cup volume: .7 l (.18 USgal.)