The Watercannon 3.0 uses the natural process of aeration found in ocean waves, river rapids, and waterfalls to cool your pool. It replenishes necessary fresh oxygen supply into your pool water, reducing hot water temperatures to more refreshing levels. This safe, healthy process is an enjoyable way to control water temperatures, especially during the hot summer season. Portable and easy to use, the Watercannon 3.0 is a valuable asset in maintaining water clarity. A 10 degree drop in hot water temperature can result in a 25% reduction in pool chemicals.