The Pyramid De-Icer is a powerful submersible motor-driven water circulation unit designed to prevent ice formation during winter months. By continuously propelling warmer subsurface water up to the surface, the Pyramid De-Icer keeps the area ice-free. It's ideal for use around a boat or dock, and can be used for aeration of industrial lagoons and aquaculture, fish ponds and net ponds. The unique one-piece design of the shroud prevents large debris from being sucked through and damaging the propeller, a major cause of failure in other ice prevention devices. Optional thermostat controls are available. Available in 1/2 and 3/4 h.p.