We're getting ready to bring home 2 corn snakes end of July- they're just eggs right now. I was thinking of putting them in together in a 20 G long but after reading all the threads I'm looking at putting one of them in a rubbermaid, at least until they're a little older. SInce I will have just one rubbermaid (the other will be the tank and it will have its own UTH), what is the best way to heat it, is it ok to affix a UTH to the rubbermaid?