Coral Vue Technology CLSC-100HOB Reef Octopus with Surface Skimmer Hanson the Back with 2 chambers Pump(s) Included :Aqua trance AQ1000S with Needle Wheel Impellor Aquarium Size (Liters) : 50L - 400L Skimmer measures (from the bottom of the unit to the top of the collection cup) 54.5cm x 19.5cm x 8cm (not including the grey pipework)