So here in Michigan we already have our tank freezing. So now I am looking at ways to get water to our emu without freezing nor consuming massive amounts of power. Our chickens and ducks have a water system that I made with carbon heat tape on the outside of pvc then the tube put into a larger tube and spray foam insulated inside it then drill the holes and install the nipples. That way chickens couldn't eat the insulation and it barely consumes power. However I am not sure how well an emu can take to using maybe a larger version of a chicken nipple. I am looking at other options like just running a pump and having a continuous flow to keep from freezing or designing a bowl that fills via a lever when the beak goes in and doing the rest of the build the same as the chicken watering system. Any other ideas?