So if one shelf has one strip of heat tape, it requires 1 thermostat? Does each thermostat only have 1 probe? I COULD, until I had the money, build a rack with 3 shelves, 3 strips of heat tape, and 1 thermostat, and just monitor everything?

I have 2 UTH stuck on my terrariums- can I use those for anything now that I'm switching to a rack system, or are they just stuck with the tanks?