i would like to beat it up with peroxide and have before, that ?species is buried somewhere around the last 1/3 of the reefcentral peroxide pest algae challenge thread. we did a spot treatment outside the tank, it went away in about 36 hours. no need to do the whole tank commit, just lift out a rock and go to town. all corals pictured so far are tolerant, but dont bathe them, you can apply around them and have zero peroxide contact to them. the resistance characters is only for backup for mistakes. the lps and zo shown are tough./
nice call on the id. we never knew what they were, just that they burn well and that patch stayed gone nicely
by removing a rock and lifting out and testing the spot externally, rubbing none off, just put on let sit a minute in the air and rinse, we get to track the death phase after its resubmerged and can watch that, draw from it, before moving on.
the action that can stop this is likely a simple test rock and 75 cents bubbly.