You don't need anything too expensive. Just one that is reasonably accurate and uses a probe that you can secure in place. A couple of these would probably do the trick https://www.amazon.com/dp/B0017N8W90/ I'd mount one on the basking surface and one on the cool side surface so you can see the gradient and basking temp at a glance. It's also helpful to have an IR temp gun to spot check temps in and out of the tank https://www.amazon.com/Nubee-Temperature-Non-contact-Infrared-Thermometer/dp/B00CVHIJDK
Clapton is acclimating okay I think. He's quick as lightning so I'm not sure how much I should bring him out of his house yet. He's not at all interested in his salad though. I wonder if I should change what I'm giving him. Least he's eating his crickets.
Things to do:
Buy calcium powder
Material to raise surface for basking spot
Scenery decals for back of tank