The 50 hp Turbo X-Treme Magnum from Airmaster Aerator is an efficient floating/surface aerator that can pump 12.5 mgd. It incorporates a turbo blower and a double-sided impeller to achieve high-capacity water movement. It can raise the dissolved oxygen level while providing high-capacity water movement. An optional chemical injection port adds enzymes and defoamers. 888/813-3680; www.airmasteraerator.com.