... ultrasonic algae control for lake, pond, pool and tank 1.without chemicals 2.no ... and fertility ultrasonic algae control for lake, pond, pool and tank featuresIt's easy to install and operateIt ... 4.5 acres or more, as well as pool,tank.clarifies,lagoonsIt's harmless to fish and ... power consumption (from 7 to 10 watts); Solar Capableoptional frquency system stainless steel probe, durable and waterproof ...