Carbon couldn't be the problem. My tank has never not had carbon in it. 24/7. However I have noticed that my huge
leather coral has not poylped out in a couple days. Normally, it it out 24/7.? And it is right above the torch.
I have no idea what I am saying. just looking and observing.
BTW head 2 is completely gone now. One head left, it's looking ok still.
I am going to take a wild guess. Based on the coral being perfect for so long and has never had a bad day. And what I was doing to the tank and then seeing what has happened since. I am going to say that these torches and the like do not like Ph above 8.4. I have dosed pretty hard and have been at the 8.5 range for a couple days.
I noticed my tank was always around 7.9 to 8.1 so I buffered up slowly for a week.
Torch was never the same since. That's my hypothosis, high Ph and torches do no Like each other. Open for discussion.
Todd