From what I've gathered the Solar Bees were designed for larger reservoirs and wastewater. The rep said that in a few years they'll have a unit available for the smaller pond for about the upper end of windmills. With the puny cfm you get from the mills this should be a much better option. They have also toyed with the idea of a 12V rechargeable battery backup similar I guess to what electric fences use. The concept of just switching environments from BlueGreen to green algae is a tough one to take since we spend so much effort battling the greens, but I have had to put up with the taste and smells from a reservoir before and I can see the point.