Dymax Slim Flow is an external hang-on filter designed to be clipped on any side of the aquarium. Unlike the conventional internal power head filter this hang filter does not take up space in the aquarium. The cascading effect provides a high level of aerobic filtration and increases oxygen levels for fish; corals; plants and other living organisms in the aquarium. Dymax Slim Flo filter is equipped with an extendable intake pipe to get strainer nearer to the bottom of the aquarium and adjustable flow control knob for reducing filtration during feeding time. Slim and compact design. Silence in operation. Adjustable flow rate. Easy replacement of filter cartridge. Slim Flo SF-240 Flow rate: 240L/H 2.5W Suits aquarium size: 45-80cm.