AEFW do not bore holes in the acro. They only compromise the soft tissue and it comes in small white spots, not bands like the OP describes. Not saying he doesn't have AEFW's, just that his symptoms don't point in that direction. Biologists have been studying what's commonly referred to as White Band Disease (WBD) for years on wild reefs. Although the cause isn't known to be pathologic, bacterial, etc., WBD has been blamed for the death of acres of coral. It's very possible that you're experiencing the same disease in your system, especially if your colonies were wild collected.
If you think you have AEFW look at any shaded area of the colony, particularly around the base or spots where two branches meet. Inspect it very closely in these areas for any small white spots. They are indicative of AEFW infestations. If you see this evidence, remove the coral and dip it in revive for 20 minutes at the concentration described on the bottle. Use a baster to agitate the water which will help the little buggers let go. Inspect the area immediately adjacent to the outer edge of the living tissue for egg masses. Pay special attention around the base. The worms will not lay eggs on living tissue or in areas subject to light. They are tiny so look closely for clusters of the rust colored eggs. You can scrape them loose but I feel that this just helps them spread because they're so stick you never get them all off. Instead, I like to entomb any eggs under a small layer of superglue.
