developed pumps for TUNZE® protein skimmers DOC Skimmer. They can also be used as replacement needle wheel pumps on any suitable skimmer available on the market. Additionally, they have a high air output at a very low power consumption and low operating noise. Motor with protective thermostat. Pump drive: Rotor with high-performance one-part magnet, with all-ceramic bearing. Mains connection: 230V/50Hz (115V/60Hz).