Yeppers, once I got a good Aq heater it has worked well, going into it's 3rd winter now...and it's seen some frigid temps, minus 12F was the lowest. Costs about a dime a day, even when it never goes above freezing.
https://www.backyardchickens.com/a/aarts-heated-waterer-with-horizontal-nipples
Thanks for posting this-I'm surprised that a 50w heater will work in the super cold weather but clearly you've proven that it can do just that! Just goes to show you there are multiple ways to get something done

<Also, Hi to all of the KCMO people posting in this thread-GO CHIEFS!>