Checked my new BP (felt awful as he's still settling but I know it was imperative I did) and he is completely clear of mites so he hasn't brought them in with him. Moved him into my room and changed his substrate from aspen to white paper towels to double check he is clear. No sign of any nasties in his water bowl so looks like it's just my pastel. (You would think it would be the other way around as my het albino (male) was bought private and she was bought from a proper reptile shop) Any idea how she might have gotten them if not from him?

I'll get myself online for some proven-a-mite now! Thank you! I should still treat my other BP although he doesn't have them himself, correct?