If you don't already have a herp vet lined up that you feel comfortable with, find one in your area. I would recommend that you have any new animal coming into your collection checked out while it's still in quarantine. Fecal exams are not that expensive. See if you can drop off a fecal sample when it's fresh.
I don't think I'd use that powder. I notice you've picked things that say "all natural". Just cause it's natural doesn't mean it's safe. In the mite powder from the other post, the ingredients listed cloves and thyme which can be irritating to the skin in humans, who knows how it will effect a snake.
Panacur is a wormer and Flagyl is a bacteriacide (sp?). Panacur is more forgiving if you overdose but don't even consider messing with the Flagyl if you don't know the proper dosages and you best be darn good with your calculations to use either of these. I've used both with my corn snakes, doing a *shotgun* treatment on a yearly basis but I'm new to balls and I wouldn't even hazzard a guess as to the proper dosages.
Good Luck with your new baby,
Cheryl 