Zoa Colony "Melting"

[cwschoon]

This rock was covered in Zoas and it seems almost overnight, decimated! I did a dip in Coral Defense and think it may have stopped the melting. I have not noticed this on others and have had this particular colony for months.
Any ideas?

 

[Haunt]

I apologize for not having a definitive answer for you, but sometimes these things just do that, regardless of the optimum parameters you provide. (pests aside) FWIW my Rastas used to do this back in the day, now they're growing like weeds. I'm still having problems with the Hornets though. Go figure... GL.

 

[cwschoon]

After the dip, all seems all is good. Am surprised at the rapid decimation.