You guys have it all wrong.... that's the latest John Deere Air-o-Vator. It's designed to agitate water for improved oxygenation in locations where there is poor water flow, such as in a large ditch or a slow moving canal. It is known fact that increasing the oxygen helps aquatic farming or fish farming. It works by sucking fresh air in through the snorkel at the rear, and pumping it down to the Air-o-Bine head. The rotating blades are actually hollow, and there are hundreds of small ports through which the oxygen is pumped into the water to evenly disperse the oxygen. I thought everybody knew that!!! :thumbsup: