So that video of the ball python is yours? You specifically made the claim that you did not have good luck with PAM. I am interested to know the details of that claim.
You are aware that you are posting on a forum where people new to the hobby often grab onto little nuggets of advice and run with them- right? With that in mind, and also keeping in mind that PAM is much safer and much more effective than no-pest strips, do you feel comfortable recommending these strips over safer, easier to use methods?
Young animals are often adversely affected by no-pest strips even when the are used in a manner which does not affect adult animals. Added to that, there are several species of snakes that have been shown to have heightened sensitivity to these strips. It's way to easy to use these strips incorrectly and harm your animals.
From VPI:
"There are two problems in using pest strips. One is that cholinesterase is an important component of the vertebrate nervous system, as well as invertebrates. In high concentrations, Vapona fumes can cause anorexia, loss of coordination and death in snakes. Some snakes are very sensitive to Vapona fumes, notably white-lipped pythons, ringed pythons, and some Asian ratsnakes. So the trick is to use a big enough piece of the bar to create a high enough concentration of the fumes to get the mites, but not too much for the snakes or the keepers. "
As for predatory mites - I've used them. They are effective, but take longer to control an outbreak and are not as effective as PAM.
Let me repeat - I have used PAM and predatory mites. I still use PAM and do not use hypoaspis. Hypoaspis do not control outbreaks in large collections as effectively as PAM. Hypoaspis can not be used prophylactically like PAM.