[I still haven't seem him eat any prepared foods.
In fact, I'm not sure if he knows what it is.
He just swims around and pecks at the rocks.
I've tried frozen mysis,brine,plankton,flakes,pellets,
selcon,garlic, everything except live brine.]
[Flame angel diet should be about 50% algae/green based. Im sure he is picking something off the rock.
Try some formula two maybe, and there is a frozen dwarf angel mix by ocean nutrition that has lots goodies in it.
You might even try clipping a sheet of nori in there. The purple seaweed by Julian Sprung is my absolute favorite!]