I use the one on the bottom of this page.
Kasco The warmwater model thermostat seems to be bass ackward for use in a trout pond if the intent is to only have it kick on for instance when air temps are below 70 F. Or am i reading that correctly? Not that it's designed for that.
Kasco doesn't have a warm water model, at least on the page I referenced. The object of their controllers is de-icing.
Are you perhaps looking at lassig's link?
