Definitely the sudden change that caused it. The real question is should you drop the nitrates back down to your “normal” (another sudden change) or just leave it and hope for the best?
I’ve had this happen many times before and fragging it only seemed to kill it faster from more stress. Spreading/pushing superglue into the coral and around the parts about to die off is my new solution.
I’ve had this happen many times before and fragging it only seemed to kill it faster from more stress. Spreading/pushing superglue into the coral and around the parts about to die off is my new solution.

