getting a mandarin to eat

[IanWR]

I wouldn't panic yet. Sounds like you are doing everything that can be done. He's probably stressed out from multiple moves, plus he's being medicated. So finish your QT, and if he's still hanging in then move him to DT. Maybe add some more cover for him? I'm still new to the reef game but when I got my bangaii cardinals they wouldn't eat for almost 2 weeks, then just decided to start. So who knows?

[MitchM]

Whenever I buy a fish, I only want fish that have been at the lfs for 2 weeks or longer and are already eating frozen food.
I would keep him in qt if he was a new arrival to the lfs.
I would put him into the dt if he was stable long term and eating frozen at the lfs.
You said you're treating with prazipro, but is there a reason why?
If there was no sign of illness, I would not have started treatment of anything.
If there's food in the qt tank, just leave him there.