Our tank heater in our stock tank uses lots of electricity. We have put ours on a timer so it doesn't run all day which cuts down some of the electric bill pain.
I would worry about ducks getting burned on the element even with a cage around one, so I don't think they are a good option for ducks.
I would worry about ducks getting burned on the element even with a cage around one, so I don't think they are a good option for ducks.