if you do, i would def. have it hooked up to a thermostat. UTH's can reach very high temperature's that could be fatal to your animals. never hook one up straight into the wall.
no matter what UTh you use and what you use it on you need to use a thermostat. Plastic will nt be affected at proper temps of 90-92 on a hot side, almost all the breeders Ive ever known use plastci tubs and UTh with a thermostat.