what did you not like about the submersible heaters?I've used a submersible aquarium heater before. Not w/nipples however.
I'm going to try a different set-up this year with my aquarium heater and see if it will work. I'll report on it after I try it to see if it works first. I sure hope it does. I've tried 4 different kinds so far and I'm not happy with any of them.
@armorfirelady
You used a heated dog bowl last year didn't you?