Aqua Medic Turboflotor 750 Internal motor driven protein skimmer for aquaria up to 400 litre (100 Gallons). The Turboflotor 750 is a compact, motor driven internal protein skimmer. A large volume mechanical pre-filter is attached to the pump. The 10-watt venturi pump, with needle wheel, automatically draws in air and mixes it with the air aquarium water. The resulting air/water mixture is forced into the reaction cylinder (75 mm, 3 inch diameter). An expansion cone with a post-filter is attached the lower end of the cylinder. The foam cup inner tube is conical shaped to improve the ejection of foam. The strong holding system allows safe fastening of, and adjustments to, the skimmer whilst it is mounted in the aquarium. Diameter: 75 mm, c. 3". Length: 55 cm, c. 22". Total width: 15 cm, c. 6".