How do you mineralize your tank i.e. add alk cal etc ... ?Good news,
I was able to stop the rtn and only lost two years growth on a few colonies.. The few colonies had about 1 to 2 inches of tissue left on the rock and it’s already healed up and growing again. So, So, thankful! I really can’t tell you what stopped it though. I did a lot of water changes, carbon and bacteria. I did have painting done in the other room, but I was running carbon in the tank along with water changes after painting done. Scary........
@Naturalreef if it is any interest to you. I had a similar sort of thing happen to me. My alk dropped to about 6.7dKh for a day or so before I caught it and about 4ish days later I started to have the same problems that you are describing. The crazy part was that the LPS were unphased but all of my fast growers got hit hard. I lost two small frags and my big colonies had the peeling skin issue.
It is only now that everything has been up and stable that the damage is mostly been grown over. FWIW.