The Farm Innovators Floating De-Icer is a 1,500-watt heater designed for metal tanks. This de-over is corded. The blue-colored de-icer features a durable metal construction, making it a reliable choice for maintaining a frost-free water during colder weather conditions. With the Farm Innovators brand reputation and efficient power usage, this de-icer effectively supports the health and functionality of outdoor water features. Brand New, box may show shelf wear. For Metal Tanks Only!!! Model H-4815
I've used about 3 over 15 years - I run them day and night with a de-icer in the winter.
They do a great job of keeping my small pond clear and aerated for my large about 30 goldfish.