I mean I generally do, I keep fish and turtles as well.
But I was going to put it in a cage with another animal I got from RDR about a year ago, and considering the breeder and the expense/morph (which I realize doesn't guarantee anything, but certainly implies a level of seriousness/commitment) I thought there wouldn't really be any risk of anything.
The animal currently in the cage is healthy, and is the one I eventually hope to breed him to.
Seems like the consensus is that I shouldn't do this though, and I guess I'll have to go to petco and get a heat pad before I go opening the package (that's here now, btw).
EDIT addt question: Could I use the flexwatt heat tape that comes with my AP cage to heat a much smaller tub? It wouldn't melt it or anything if I hooked it up to a thermostat, right? It's way more than would be needed but I haven't hooked it up to the cage yet and this could save me a little cash and effort till I do.