Tunze`s newest and most compact skimmer! Replaces 9002 Nano DOC protein skimmer. Measuring only 4.3 x 2.5 x 8.5 inches. It is ideal for nano reef aquariums up to 37 gallons (15 gallons for high nutrient or dedicated SPS tanks). Includes needlewheel pump and magnet holder for up to 3/8" glass or acrylic. Features Surface suction with surface film removal. Intermediate chamber with a patented anti-overfoaming system. Bubble-Free outgoing water. Large skimmer cup (0.