Hiii and

The probe under the UTH between it and the tank is for a thermostat, which is pretty necessary and will regulate your UTH. While the one under the substrate is sort of a double check for what the temps are on that side of the glass.

I love my baby BP (6 months old ish) but the other guys are right it does take quite a bit to keep the husbandry OK sometimes. I enjoy her quite a bit and she is much more chill than any corns I have held (but I have never owned one so maybe they were just uncomfortable with me IDK). Mine is currently in a 20 gallon long, but will need to be upgraded either to a suitable rack or a min of a 40 gal tank eventually. But some babies are too uncomfortable in big tanks to just start out that way. Sorry if too much info for meow and my . Welcome to the BP bug!