Dunno if anyone is still viewing this thread at all, but I currently have the same kind of situation happening in my tank: GHA covered in what looks to be cyano/dinos. For me, it seems that dosing No3Po4-X by Red Sea seemed to spark this nutrient release from the rocks. I'm sure your issue has been resolved by this point, and if it has, I would love to hear your experience, but I've been told that as long as I keep increasing the bacteria colonies via dosing the NOPOX, eventually it will out-compete the algae/cyano. Would love to hear anyone's insights on this even though the thread has been dead for the last couple years
