if your building a rack system u might want to invest in a thermostat so everything is taken care of as far as temps go...
There is no might in this situation. If you are using Under tank Heaters a thermostat is a necessity. Without the ability to control the out put of the uth you will severely burn your snakes.
0.1 Nazgul (Normal BP)
2.1 Allah Prometheus and Kali Ma (Kitties)
0.1 Minerva (Puppy)