I responded on the link above; I too had these bugs. White little buggers that moved around on the coral, and the coral wasn't expanded well. I actually thought they might have been copepods, but honestly with something that small you'd need a microscope to really see anything. I think I tried dipping it in iodine which didn't work, so I got a sixline wrasse. Since then, the problem has been taken care of.
Sixlines are great at eating tiny little crustaceans like that, and won't harm the coral in doing so. If you don't have one and have other compatible fish, you might consider going the "natural" route to taking care of the problem.