Our Pulsar 4400, is an ultrasonic device designed to combat algae and biofilm growth and build up without the need for chemicals. Our Pulsar emits 4400 frequencies. that target green and blue-green algae, golden algae, and also dinoflagellates. This frequency set delivers the highest targeting precision in the industry for algae and biofilm control. The Pulsar 4400 can cover large bodies of water like lakes and reservoirs, or can be used in small targeted industrial applications like clarifiers and wastewater lagoons. This unit comes with standard power or solar options.