For 50 years, fishkeeping enthusiasts have looked to the Tetra name for products and solutions that add ease and beauty to their home. Whether you’re an experienced hobbyist or just starting out, Tetra has everything you need–-from a large variety of quality fish food and innovative equipment to test kits and decor. In cold weather, toxic gases caused by decaying matter and fish waste can become trapped under the ice by releasing harmful pond gases. The TetraPond De-Icer helps release harmful pond gases by keeping an area of the pond ice-free. It features include a natural stone finish that blends in with your ponds surroundings. This product is 300 watts. Energy-efficient thermostat control shuts off power when not needed. UL listed. Effective to – 20°F (-28.8°C). 15 foot cord. 3-year limited warranty. The TetraPond De-Icer helps fish stay healthy all winter long making it your winter survival solution for fish!