I just noticed today that one of favorite acroporas is dying. I don't know if there is a difference between dying and bleaching but the tissue is actually dissappearing on a coulple areas of this coral. This happened with another coral in the same area of my tank and I tried to frag it but it didn't make it...it was pretty small though. Here is a photo of whats happening. Ca, Alk, salinity, and Temp are all normal. Everything else in the tank seems to be doing fine. This coral has been in the same place and nothing has changed for over a year. I removed the coral and placed it at the bottom of my tank. Anybody have any ideas on what I can do? Please help.