Acanthophyllia/cynarina holes??!!

[alliecat]

Hi so I have a beautiful acanthophyllia dehayesnia and cynarina lacrymalis that I acquired about a month ago. At night when the flesh retracts (like normal- not recedes) I noticed the cynarina has a few small holes, and the acanthophyllia now has one as well. During the day they inflate as normal. Should I be feeding them more?? Could something be picking on them??? What should I do to treat the wounds? The holes appear clean