KlopKlop
Crowing
I think it might help a little too Kloppers. Aart says she uses an Aquarium heater and it stays 65 in the winter. I saw she had reflectix around her bucket too. I have reflectix on the walls in my coop and so far they birds haven't bothered it. I don't know whether to do it or not. As the birds have historically not wanted to switch over for me. should get out my old bucket with the vertical nipples and see if they'll at least try...this new younger flock may surprise me.
Just had a follow up thought - The refletix may allow you to get by with a lower wattage heater and save you on your power bill too