The MIX-AER-GS unit from AQUATURBO SYSTEMS provides low-speed bottom mixing and aeration that operate independent from each other, providing economical surface mechanical mixing and aeration. The Screwpeller design ensures high oxygen transfer and is completely non-ragging. For troublesome floatables management, the FRED (floatables re-entrainment device) unit re-entrains floatables while also providing downdraft mixing. 479/927-1300; www.aquaturbousa.com.