Pretty nice list of livestock there. Wouldn't mind seeing a pic of the tank,and the coral in question. The first thing that comes to mind is bacterial infection. Have you tried dipping the coral in iodine or melafix? Is there enough flow in the vicinity ? sarcos hate debree next to them.Carbon is also good at removing the built up toxins the softies release and that can contribute to tissue degeneration.
Oh! I presume this is a sarcophyton you are talking about?
Oh! I presume this is a sarcophyton you are talking about?