Everyone messes up a bit at times
Firstly, do not refreeze a thawed rat and try to feed it again! You know how when you thaw chicken to eat, and then if it sits out for 5 hours you can't rethaw it and hope it'll be good the next time you thaw it? Same thing with snake food. If they refuse it and it sits out, just throw it out. Not worth getting your snake potentially ill the next feeding, you know?
If you have a thermostat with UTH (set around 90F), that should be enough to not only have a hot spot, but warm the entire tub to where it should sit around 80F, I would think. I'm not sure if UTHs are ok on plastic tubs, though... Sorry I can't remember what source of heat you are using for your BP. But you do not want to get too high of a wattage bulb that may heat up the tub TOO much.
I don't have any experience with tubs, I just use glass tanks, so I'm not much help there!
Well seems like I dodged a bullet right there with the refrozen mice thank god he didn't ate it
Sadly, the UTH doesn't warm up the air just the bottom part of the tub/glass tank. I'd guess that maybe with higher temps it could? But then I'd be risking my ball :/ I think the oil heater is doing wonders now. My room is at 80F but my humidity took a bit of a hit and it's now at 45%. Hopefully the temp will get higher soon. The only real problem would be if my power goes out. I don't have a standby generator and no UPS gonna hold on my 1500 W olive heater.