Ok first off, examine all your frags/colonies with a magnifing glass. tweeze them off, look around up and down all around for eggs. If you find some which you will tweeze those off aswell. Then once you have done then dip them, shake them around, up and down, all around.
Then go out and buy yourself a sixline, radient, or a twinspot hoggfish.

I would look over your frags a month later after buying one of those wrasses just to make sure they are getting all of them.