I'd love to have an ID on this coral disease my red planet has had for a while. It has slowing been eating away at the skin and leaving sandy rubble behind. It appears to be spreading to the montipora caps nearby. Other corals are doing well and a montipora cap on the other side doesn't have this. Water parameters are alk 4 meq/L, cal 520, mag 1400+. Any ideas on what this coral disease is and how to treat it?