ultrasonic algae control for lake, pond, pool and tank 1.without chemicals 2.no harm to ... fertility 3.durable ultrasonic algae control for lake, pond, pool and tankfeaturesIt's easy to install and operategross weight: 16KGIt ... to 4.5 acres or more, as well as pool,tank.clarifies,lagoonsIt's harmless to fish and other aquatic ... operation is available ultrasonic algae control for lake, pond, pool and tank