Kasco time and temperature controllers are deigned to run your Kasco De-icers at maximum efficiency to save energy and add custom control to your dock de-icing. Kasco De-icers push warm bottom water to the surface creating an ice-free area of protection around your boat, dock, pier, or other in-water property. They help protect fish and aquatic species, by allowing for open areas where oxygen can enter the water. Kasco De-icer time and temperature controllers come in two variants, the C-10 model which gives you automatic controls over the temperature in which the De-icer operates and the upgraded C-20 model the lets you control time and temperature.