A new type of "stirrer"
http://www.w3schools.com/TAGS/tag_title.aspEco Factor: Water circulator improves water quality using solar energy.
The SolarBee long-distance water circulator helps improve water quality in lakes and other potable water sources, by creating a gentle and laminar flow over a long distance. The device improves biodiversity in lakes and helps eliminate thermal stratification and stagnation in potable water.
Apart from improving the quality of fresh water and lake water, the device reduces odor in wastewater and industrial water reservoirs.