I had them in my 60, and I know of another reefer that had them. I tried everything, injecting them, boiling the rock. I kept missing a few and they would spread. Until I got myself an angel. I picked up a lemonpeel without knowing anything about them, and 2 weeks later they were gone, so were my yellow polyps, but nothing else.
I do still have the lemonpeel if you are interested. It has taken an interest in my new clam, and I have to cover the clam with an egg crate box I made until I figure out what to do with it.