Horizontal nipple waterer freezing

[Beaker99]

https://www.amazon.com/Orlushy-Submersible-Heater-Fish-Thermostat-freshwater/dp/B07H2L8DZR/ref=mp_s_a_1_4?crid=RZOYSGB59Q49&keywords=aquarium+heater&qid=1705251344&sprefix=aquarium+heater,aps,213&sr=8-4

This is the one I have, the heater has to be strong enough to keep the nipples unfrozen. 150w at 70f works great for me and it's -10 or -20 surrounding temps

Mine is nearly identical. I'm getting the hairdryer. Lol