Another rtn thread

Sooo had anyone found out why this happens and what causes it?? I have an acro frag that I've had for at least 6-7 weeks now and yesterday it was fine and now when my frag tank light turned on its flesh is gone?? I understand it can happen when a coral is moved and is stressed or whatever but what makes this happen for no reason when nothing has changed and I haven't done a water change in over a week?? All of the frags around it are doing just fine so idk I don't get it??



Another question is should I remove it?? Will it affect other coral around it??



Stewie