Includes Rio 800 PumpFor tanks up to 75 gallonsDimensions:-Skimmer Height: 17.5"-Minimum Tank Height: 12.75"-Minimum Overhead Clearance for Proper Function: 5.5"-Depth: 2.75"-Width: 6" For hang-on use onlyAlong with the pump, standard equipment includes an adjustable collection cup, and a special baffle system which prevents any bubbles from entering the aquarium.