Bubble Magus protein skimmers combine the value of the low cost imported skimmers with well known reliable pumps like Atman. The affordable imported body combined with industry trusted pumps produces a great overall value. Model Tank Size (gal) Pump Pump Power Air Intake Cylinder Water Level Dimensions NAC3+ 25-80 Atman ph1100 8w 200 L/H 4" 8"-10" 6.8" x 4.3"x 17.5" NAC3.5 25-80 Atman ph1100 8w 300 L/H 4" 8"-10" 4.5" x 6.6" x 17.1" &nbs