Make sure they don't have anything in the container with them that will mold, make sure they have plenty of ventilation, and with these conditions met, forget about them for a few weeks. In time, the twitching fetal creatures will transform into beetles without any help from you. As for how long it will take exactly, Well, I dunno. I personally use the forget about them method that I described above. I swear, watching mealies go through metamorphosis is just like watching water while waiting for it to boil; the more attentive you are the longer it seems like it takes. Just be patient. Good luck
