Bubble Magus Hero 180-S skimmer is small yet effective. Features a parabolic body cone design for up to 10 percent increased efficiency, an air nozzle to adjust air mixing ratio, bubble plate, needle-wheel impeller, easy to remove collection cup and easy access Syncra Sicce Psk1000 pump. Perfect for aquariums 185 - 240 gallons. Measures 9.8 in. x 7.2 in. x 20.6 in. with 5.9 in. dia. cylinder.