Chemical-Free Ultrasonic Algae Control: AlgaeControl.US has cooperated with Sonic Solutions to assist in the development of the latest `state of the art` generation of ultrasonic technology for WWTP, Lagoons, Potable Water and Irrigation Reservoirs, Cooling Towers, Water Storage Tanks, Ponds, Lakes, Swimming Pools, Water Gardens, Koi Ponds, etc. Now with a 40 kHz ...