High-quality pump engine mounted on a 450 mm cylindrical mantle that may be mounted either standing on the bottom or floating in the water. Thanks to the construction the unit may be floating but puts itself in standing position on the bottom if the water level decreases. The aerator is easy to mount and to retrofit even if you have an old diffuser system allready installed. OptusAir is a modular system where the parts are determined by the desired water depth. The maximum water depth is 6m. Connects to 400V / 50Hz 4-pole current.