The Aquascape 300-Watt Pond De-Icer is ideal for keeping a small hole in the ice during cold winter months and ensures proper gas exchange, helping keep fish alive througout the winter. Maintaining a opening in the surface of the ice is paramount for the safety of pond fish. The Aquascape 300-Watt Pond De-Icer is enery efficient and the stainless steel construction prevents corrosion and cracking throughout the year, providing years of trouble-free operation. A built-in LED light indicates when the de-icer is in use, making it easy to verify functionality throughout the season. The 300-Watt Pond De-Icer is backed by a 3-year warranty.