It's been a hard road, but I am seeing the light at the end of the tunnel regarding battling GHA. Between lower phosphates, lower nitrates, no white lights, scrubbing the rocks every two weeks (the ones I can), a proper CUC, adding a refugium, etc etc. It feels good to (fingers crossed) not be losing ground and actually feel like you are making some up. This weekend I plan to pull all the rock out again, get 2 aptasia that I can't reach and scrub 80% of the rock I can. The one rock I haven't been able to do much with is the zoa colony in the pictures. I have tried cutting it, but that is easier said then done. This colony is made up of about 50 frags from about 4 years ago I think. In one picture you can see how the GHA has settled in on some of the zoas, they are not all like that, but about 30% are like that. I wish Zoa's were immune to peroxide, I heard that will instantly kill GHA (and everything else it comes in contact with). Does anyone have any suggestions? Or is this my excuse to get a lowboy and create about 40 zoa frags?