The 3400HCF Kasco Circulator Ice Preventer creates a directional flow in your pond/lake to prevent the growth of algae. In the summer, Kasco circulators stir up inactive water to limit unwanted aquatic plant growth and mosquito reproduction. In the spring/autumn, they de-stratify deeper bodies of water to prevent negative effects associated with pond turnover. And in winter, it keeps areas of water open and ice-free to prevent killing fish populations and for protecting permanent fixtures in the pond. This ice preventer also prevents ice build-up around your dock. Three methods to mount it: rope suspension, universal dock mount or horizontal floatation unit.