Tunze DOC 9006 Protein Skimmer. **** PRODUCT MANUAL **** DOC 9006 Protein Skimmer (9006.000) is recommended for aquariums up to 500 litres (132 US gal.) of salt water. Dimensions: L125 x W113 x H378 mm (L4.9 x W4.4 x H14.8 in.) 230V/50Hz (115V/60Hz) 12 W Water throughput: 800 l/h (211 US gal./h) air capacity: 500 l/h (132 US gal./h)skimmer cup volume: .4 l (.10 US gal.). Equipped for operation in the aquarium or sump. For operation in an aquarium cabinet, use DOC Skimmer Extension Set 9005.40 in addition !