I don't think it would be impossible to switch to frozen/thawed. The pet store said it would be almost impossible. I feel they just want us to keep coming to them for live food. We can't buy live food near where we live, so we'd have to make a trip once a month to get more live feed. (We can buy frozen food near where we live with no problem.)

We are keeping the humidity between 50 and 60, despite what the pet store said.

We are going to fill the tank in for sure. The 3D background came attached to the exo terra. I will double check it is secure. Thanks for confirming my thought about his meals. He will be getting bigger meals from now on.

As for the thermometer issue, we also have a probe thermometer that does humidity as well, but you can't see it in the picture. Getting a second one for the other side asap. We will get two hides the same size. We do use a heat mat, but it wasn't on a thermostat. I'll get a heat gun, too.

Thanks a lot everyone for all your welcomes and suggestions. I am willing to listen to all suggestions as I want his life to be the best it can be.