Hi again everyone!

I'm just curious about the best ways to heat a rack, and how one goes about monitoring this? I know a thermostat is the way to monitor, but how does that work exactly? How do you monitor every tub to make sure the heats/humidity are right in every one?

This may be a silly question, but I'm still in tanks and would like to eventually go to tubs in a rack. Tanks are a pain to keep heat/humidity correct. I also intend to vastly expand my collection once I'm out of college, so it'll be necessary. I'm just unsure of how the whole rack process works. And I know everyone keeps saying racks and tubs are way better. So I finally decided just to ask.

Thanks in advance everybody!