i posted about a week ago that i thought maybe my bp hate mites and now its confirmed and they all everywhere! dammit! how did this happen?!!! I mean im already getting PAM and going to treat him in one of the spare 15 gallon tanks i have, lined with paper towels, etc etc, but my fustration is how did this happen?

When i got him months ago from a very good breeder he was mite/tick free for months. I never take him outside and i cant understand where these things come from, i mean i have had issues with BPs with mites, but that was one i bought from petland and it CAME with mites, how did this happen?