GridBee AP series air-powered mixers efficiently mix aerated and anoxic basins of all types, including those with high mixed liquor suspended solids (MLSS). Designed with flow rates ranging to 4,000 gpm in a small footprint, GridBee mixers are clog-free, with no moving parts to maintain. Lightweight and easy to install, the mixers can be purchased with or without a blower. Air requirements range from 1.5 hp at 3 psi to 3 hp at 6 psi to achieve full-rated performance. Rental and lease-purchase options are available.