Melifix is good for open wounds and fungus treatment and can aid with the fight against Ick. I have had to treat my DT with Prazi-pro before to treat for Flukes nothing died my Nem consumed him self for a while that is what my kids thought. the nem retracted and hid for the week I use prazi-pro and came out when treatment was over, about 2 days after skimmer and carbon was back in use. corals didn't really care about the treatment I think these are good things to know. as far as corals I had in the tank at the time there were:
montipora caps
frog spawn and a hammer.
some mushrooms
some soft corals
I had snails, shrimps and hermits which after the second or third day just climbed in their shells and waited till the treatment finished, I almost forgot about that.

Bill