The new Shark PRO is a completely redesigned internal filter. The new models come with upgraded materials and Innovative design. The new Shark PRO stands alone with unique magnetic system and larger filtration capacity. 500 700 900 Max flow rate 220-240V - 50 Hz l/h 500 700 900 110-120V - 60 Hz US gph 140 190 240 Watt 220-240V - 50 Hz W 4 7 10 110-120V - 60 Hz Cable Length m 2.2 ft 7.5 Aquarium capacity* L 40-140 120-200 180-260 US gal 11-37 32-53 48-70 * Volumes rated for lightly to moderately stocked freshwater aquarium. 500 700 900 Max flow rate 220-240V - 50 Hz cm 310 620 930 110-120V - 60 Hz cubic in. 19 28 57 Watt 220-240V - 50 Hz cm 100 200 300 110-120V - 60 Hz square in. 16 32 48