I can't see what problem except what looks like a white mould on some.
looks like they are being disturbed by something should check for some Nudis or maybe they just need to settle in. How long have you had them in your tank? What type of lighting you running? hows your parameters Po4 and No3
If it is mould, I would scrape the moldy zoos off , dip rock in coral rx and place in a high flow area in a quaranteen tank
Zoapox? Are they closing up and dying?
Give them lots of flow and lots of light, emphasis on lots of flow and lots of light.
What coral is that in the third pic? Looks like the skeleton of a brain?