I read some articles about these predatory mites for reptile collections and this seems to be the best and safest solution for reptile owners! Every article or reptile owner who have used these as a way to get rid of snake mites have said this is the best treatment they have ever used. One of these predator mites eat anywhere from 5-20 snake mites a day.This includes the eggs,larva and adults! These are usually sold for gardens to get rid of springtails and other garden pests.They are harmless to reptiles and will die off once they eat all the snake mites.
Those little red mites most likely are chiggers as the true 'snake mite' is an exotic that is from Africa.
Here is a webpage that offers these mites for sale!
http://www.biconet.com/biocontrol/hypoaspis.html