I don’t know what’s going on!?

[eric.20]

Hi guys,
Couple of my Zoas getting white spot on it and the other one losing its tentacles.
There about 4 weeks in my system and I don’t know what going on..

One fell of its plug as well

 

[ndrwater]

I think I'd start with a dip at this point. See what, if anything, comes off.
Knowing your parameters would also help. Zoas like quite a bit of Nitrate and some phosphate to be happy

 

[tankstudy]

Hard to tell from your pictures but white spots can indicate zoa pox. If you could get better pictures of the white spots that would help.