Temperature question

[sweatshirt]

I have a ZooMed thermostat that I'm using for Magenta... the problem is it doesn't have ... "settings". It just has a green area (cooler), yellow (warm), and Red (warm-hot). I usually keep it on a high yellow/low red and use my temp gun and it usually says about 85-89 (fahrenheit).

I use both a UTH and a bulb but the bulb is low wattage and it's mostly for viewing. Should I just invest in a new thermostat with legit temp settings or is the temp gun way safe?

My other question is the temperature. I get SO cold easily so the house is pretty much always at 77, resulting in the "cool" side of the enclosure being 79 usually. :/ I'll turn it down to 74-75 if I need to for Magenta but I'll freeze to death, even in this summer heat.

So is there any way to make that side of the tank cooler without turning down the house temps?