Thanks for replying!

As far as humidity goes I'm not that concerned about it as I have read in several sources that even 80% is good and a local vet, not to say the only one but the most recognized and credible in reptiles here who works at a snake venom research facility taking care of those animals and also helped me with the first python even recommends 80-90% due to our country's conditions and snakes tend to do better that way but i still try to keep it lower than that. I don't mist the tub. Just the water dish and that's it. Same as the boa which is doing great, 100% healthy, full shed and has similar requirements.

The second hide is something I've had in mind and might try if after another week he doesn't eat although might be hard to fit in that size tub.

By weaned mouse might be what's called a hopper. Next step from a fuzzy. Just when the mouse stops nursing. And cold side temp is ambient between 22-24°C.

Also, the tub is not in a rack and it is clear. I would post pictures and a video to show the breathing but I'm not able to post attatchemnts. Maybe because I'm new here or something like that