Rescue of a 7' Boa

[exwizard]

This friend of mine with what started out as a "big snake" question led me to go to her house to check this rescue out. Apparantly this snake is a Boa of some kind and has been living is a small clear plastic tote that has not been heated and inside her tote was an inch thick of her own feces. The water bowl had what they passed off as water but was brown muck. The only interraction she got was a rabbit tossed in every other month with no other interraction whatsoever. She also has an RI, not surprisingly, and will get meds for that in a couple of days. Now come to find out, she has mites and has been soaking in her new waterdish as best she can but this dish is not big enough to drown all the mites but she keeps trying. Ive never had to deal with mites before and other than try to get her a bigger waterdish, Im not sure what else I can do. Btw, of course she is under quarantine so that parts under control. Any ideas?