I think the primary factor for your issues, as my esteemed colleagues have already noted, is that they have been grossly underwatered since you moved them into the current mix.
They probably need to grow new roots to recover from the previous medium, so they need to stay moist.
I suggest you try the following:
- Adjust your tap water temperature to be tepid.
- Take each pot to the sink and run water through the medium for a few minutes to really wet it.
- Wait 15 minutes or so, and repeat that.
That process will "open up" the bark chips to hold more water internally. Once they have drained, put them back in a very warm, shady location and most of them should recover.
If you want to accelerate the process, add
KelpMax to your watering a couple of times.
You're going to need to feed them periodically, but I'd not worry about that until they respond to the improved watering.