Overview It's simply amazing that the power needed for a 180 to 300 gallon tank can be found in such a tiny 8 in. x 12 in. x 23.6 in. skimmer. Bubble chamber and full cone body ease transition of bubbles into collection cup. Gate valve allows you to adjust the output. Silencer ensures quiet operation. Powered by a 2500 custom Italian Sicce PSK pinwheel pump. Quiet, space saving skimmer has the effectiveness of larger models, but with a much smaller footprint.