I've been going the totally non-toxic route with my little mite outbreak here and it seems to be working
I haven't seen any fully grown mites for a while in any case
since the treatment doesn't tox the snakes and some of them seem to enjoy it, I'll just be continuing with the treatment twice a week for a month or so
it just involves very thorough tank cleaning, bathing the snakes and slathering them with oil
it feels a bit like running a snake spa
btw - I got this little bottle of snake oil and it's so nice, I've started using it on myself