The Maxspect Gyre Generator 80w with PSU power supply, suitable for tanks up to 3,800 litres, is part of the next generation of water moving technology. The development is based on a propeller nozzle facility rather than traditional powerheads and wavemakers. It's also the first device that specifically creates gyre-type water movement within the aquarium. The Maxpect Gyre XF280 requires the Maxpect Gyre Controller which is sold separately and used to power multiple Gyre generators simultaneously. Maximum flow: 21,000 - 22,500 litres per hour. Dimensions: L378mm x W95mm xH52mm.