Zoa fungus?

[tupes]

I understand you don't want to give up. Sometimes you need to. Zoanthids and palythoa corals have a toxin that CAN harm you. Please take the warning from myself and @A. grandis And Get Rid Of It. Do not put It back in your tank.

 

[tupes]

Here is a bunch of literature on palytoxin. https://www.google.com/search?ie=UT...-sprint-us&source=android-browser&q=palytoxin. This is not something that you want to say that you learned the hard way.

 

[CmMagenta]

I had that same thing going on. It spread from one rock to another over time. I never figured out what it was but adding vitamin c stopped the issue. Although I did add wrasses and other fish to help with pest and decay. Did you save any zoas?