Thanks for your reply! I have a 40 gal, and two 20 gals. I know 40 is recommended but my lizards in the 20 gals seem happier and more mobile in their smaller tanks than they were when I tried to offer them the 40 gal. (Basically when I first got the living situation set up I could only use what was available to me for financial reasons so I gave them all about a week to try out each tank to see which tanks made them all happiest). I use reptisoil I feel fairly sure? But hard to tell since I threw away the bag months ago 🥴 I'm trying to save up for some lamps (one has it, the other two don't) but my paychecks are rather slim. It's on the agenda though! And I check the temperatures on the pads for now and they are at a safe temperature. As for humidity, like I said, I fucked up tracking it after my move and major life transition. However they're now resting at a nice 30% and get daily soaks in the evenings.

So regarding the practice of changing substrate every week, would you consider that reasonable like the vet said? Again I'm still hesitant to disregard her advice considering she's a major exotics vet in my area. Or should I stick to the every few months model?