Like most posters said it is the toughest to rid [so far] I had it once. So take my answer as such.
Manual removal probably helped it spread. So next was the peroxide. It worked fast and got 90% [I kept socks on to catch it] and after 3wks it came back some ,and the peroxide didnt help much after that. [others mention how it seems to get resistant to peroxide IDK] So before it got as bad as before I got a Zebrasoma flavescens [yellow tang]and he worked it away in about 3-4wks.
Its been gone now for 6mo. And I wouldn't say any one method works best. Some have luck with turbos others dont. I doubled my GFO the whole time ,maybe it helped ,IDK.
I restocked my blue leg hermits ,and maybe they help pick at the rocks ,not sure but the help in other ways.
Peroxide...same maybe yes or maybe no. I just hope mine is totally gone.
I just needed to keep telling myself "calm down ,or you will sleep on the couch if you scream and throw this rock out the window. :tsk: