I agree with what Robert has mentioned.. noting that the 'flaoting' de-icer you mention in no doubt similar or actually a cattle-trough de-icer.. which is normally using 1500 Watts... which is pretty pricey to run over the winter full time.

Owner/Builder of Ottawa Canada's first official off-grid home.

http://www.mygamepictures.com - Hosting your outdoor adventure, fishing, hunting and sports related pictures!