My basement fish room is in the low 50's on very cold days (we have lots of them) so the problem is sizing the heater. I have a 75W Neotherm for my Nuvo 16 Roulette. Since worst case is 30 degree delta between ambient and tank, its 14 degree difference capacity is not enough. Buying a second one is an option but not on I prefer. I have a Ranco controller for the tank but it won't help if the smoking goo issue happens. And, the Neotherms are kind of expensive.

I have a ViaAqua...