How can I treat this?

[mnml]

I'm not sure what this is but it seems to be killing one of my zoa colony. It looks like a brown algae fungus growing over the polyps. I check my parameters and they're all normal. I've tried doing water changes but can't seem to remedy the problem. All my other zoas/palys/coral are doing fine.

Does anyone know how to treat this? The colony is on my main rock so I'm hoping for something I can treat "in tank."

Any help is greatly appreciated. T.I.A.

 

[650-IS350]

get a supersoft toothbrush and scrub it very lightly..

 

[mnml]

thanks delsol650, i'll give that a try tonight.

anyone else have any ideas? i'm thinking of just fragging it off the main rock if it doesn't go away. i don't want it to spread to my more expensive zoas. =\