I just built a rack

[XSReptiles]

I just bult a rack, but I have a question. Do I have to put a thermometer in every tub?

I like using herpstat thermostats, the LCD panel provides a contant readout of probe tempature. I do have one rack thats controlled with a reostat. I have indoor/outdoor digitial therometer on the heat tape to see what the temps are at for it. I always use a infared temp gun for my spot checks.

Xavier