9004 Model The Comline® DOC Skimmer 9004 is designed for use in seawater as well as mixed and soft coral aquariums up to 250 litres (65 gal.) or for sensitive reef biotopes with hard corals up to 150 litres (40 USgal.). (1) The skimmer cup also contains the foam reactor and can be removed easily. (2) Surface suction to remove the surface film. (3) Compact housing protects the interior and the reactor against light and algae. (4) TUNZE® Foamer 9004.040 high airflow and low energy consumption. (5) Air control to set the moisture of the foam. (6) Silencer for exceptionally quiet operation. (7) Bubble-free discharged water. (8) Including Magnet Holder up to a glass thickness of 12 mm (1/2”). Recommended, depending on tank load, from 60 to 300 litres (15 to 79 USgal.) of seawater. Immersion depth: approx. 225 to 245 mm (8.9 to 9.7 in.) Skimmer cup volume: 0.2 liters (.05 in.) Air capacity: approx. 200 l/h (52.8 USgal./h), Energy consumption: approx. 5 W (max. 10 W) Power supply unit: 100-240V / 50-60Hz Cable length: 3 m (118.1 in.) up to the Turbelle® controller Dimensions (L x W x H): 110 x 90 x 305 mm (4.3 x 3.5 x 12 in.) Magnet Holder up to a glass thickness of 12 mm (1/2").