Ongoing Zoa issues actually caused by nearly invisible algae?

[Edgecrusher28]

I have been battling an ongoing Zoa issue for at least 6 months now where no matter what I do I can not get them to fully open. Not trying to sound dramatic, but if you name it I have likely tried to do it at one point in time. What brought me to this point, was I wanted to inspect a few frags of my Zoa's that were having issues to see if I could find some kind of bug or pest. What I ended up finding is what appears to be super fine stands of Derbesia growing or attached to the actual polyps skin which i assume irritates the crap out of these Zoa's. Just tossing this here to see what others have to say about these pictures and if by chance you all have a remedy.

Below is a picture of a half open White Zombie frag.

Below is the face/polyp

of a Fire and Ice frag.

 

[vtecintegra]

Shut of flow, and squirt some hydrogen peroxide at the area.

 

[Edgecrusher28]

Shut of flow, and squirt some hydrogen peroxide at the area.

I have done several peroxide dips in the past and even went as far as to dose peroxide. I suppose I can try a few frags at 100% since I have always done a 50/50 dip.