No I didn't see those unless that was the one with the small metal bowl sitting in a frame?
I just went out to dump water bowls for the night and check for eggs before locking up. I had to laugh. I have a little Bantam cross pullet who has been 'thinking' about going broody for the last month or two. I'll catch her sitting on an egg or two but if I take them away from her and put her on the roost bar, she fusses but gets over it for a day or two before repeating. Tonight she was hovering over a lone egg in one of the nesting boxes like she was debating on whether or not it was worth her trouble. When I snatched the egg from under her I knew why. The thing was ice cold. No way she wanted to lower her belly down on that egg but she REALLY wanted to! So she just stood there with her chest lowered to within two inches of the egg but no lower. Needless to say she is back up on the roost bar tonight and the egg is sitting on the counter defrosting.
I had an interesting conversation with one of the guys who works at the local MFA Agri store where I buy my feed. They had just got in some heated dog water dishes. Not quite a gallon in size, about a 5 inch depth, 8 or 9 inches across. I asked them what they were rated at because my Farm Innovator heated dish didn't make it past 8 below without freezing over. He said I was expecting too much of it in the current cold weather but was impressed when I told him some had them work at 16 below.
So what is the coldest temps your water heater has endured before Hades froze over?