I just wrote a response but I must have clicked "go advanced" cuz it disappeared into the internet ether.

Shortly after putting them in, I took them out of fridge. Figured they're probably all about the same age so if some are pupating, them most are about to. I did want to keep feeding from them, and I was finding lots of newly molted ones yesterday and the day before but only one today. So, when sifting through looking for pupa shrimps, maybe I'll find more white ones, maybe not, but you're correct, nothing will happen in the fridge.

Found a thorough how-to sheet listing temps and humidity levels and time frames. If I keep them on roach bin, I *might* see bugs next week. Maybe. The meal worms are back up on shelf next to crickets. It's warm but not too warm, and they seemed to be doing fine there. As I said before, in my erased comment (which was the very best comment ever), this is kind of exciting.