GSP removal?

[volcano]

I have these pesky GSP that are taking over my large eagle eye zoa colony.  I thought I had killed every bit of it by gluing coral on top of the GSP.  However, now I see that the GSP has found a way onto my zoas.  Any recommendations on how to eradicate this stuff from my zoa colony?  My goal is to kill it and have my zoas grow back over where the GSP is. 

[Mussin]

try to peel it off with tweezers.

[volcano]

That's what I did last night.  I just don't want it to ever come back.  I thought I had it gone before but it managed to come back.  So now I will keep picking anything I see and hopefully it doesn't ruin my zoa colony.