Thanks everyone! My rack is also very open. I moved my pinstripe that is almost 450 grams down to a 15qt tub so I could bring my 2 normal girls out of quarantine. I was feeling bad about it but I guess it is fine. He ate today so he doesn't seem to mind the downsize.
I usually have 2 or 3 (one on cool, one on hot, & one humid hide) hides in each tub when the snake is on the small side for the tub. I really think that I just started them on big tubs too soon because I had the room. They seem fine either way.
I am working on a second rack outside of quarantine.