When brush rotors approach their useful life, a prudent upgrade option is to replace them with Disc Aerators from Evoqua. Existing tanks can be used. Disc Aerators allow for improved mechanical efficiency, simpler operation, and lower energy and maintenance costs. Their rugged, durable plastic design is lightweight and compatible with existing structures, and does not require baffles or additional mixing equipment for oxygen transfer. The Evoqua product is proven and backed by four decades of installation expertise.