@ JC-Reef - I actually got a wild colony that had acro crabs in it. Great little critters. Then got red bugs (from the same shipment). Treatment for the red bugs killed the acro crabs (unfortunately), and when they red bugs and acro crabs were gone... boom, AEFW. I guess those little crabs were keeping them at bay because their colony was the outbreak monkey.
@ Brian - I have heard this too but in my experience they went after others first. Maybe they just hadnt gotten to the Valadia yet. just a data point.
In short, I delt with this, removed my colonies, killed all leftover in tank acro, and using a QT tank linked to the main system (but with its feed micron filtered) treated all of my colonies three times (over a month and a half). DT was fallow for three months. No sign of them now, on any frags or colonies. Repopulating DT now.
In the future, I am clipping the bases off of ALL frags and colonies and dipping them all in both interceptor and CoralRX. It was a LOT of trouble to get "parasite free" and I wont be going back...
I wrote a "how to" on my method of beating the worms, PM if interested, I've been too shy to post it to the interweb computernets yet.
The good news is, it isnt the end of the world. I only lost two colonies in my treatment of probably 30, one due to initial infestation, the other due to a mistake in CoralRX dosage strength... The tank is looking good again!
Oh and somone a while back asked about melanurus eating critters in the tank (like hermits, snails, starfish). I have one and it definitely does. My sand sifter starfish has only three arms, my snails and hermits are under constant attack!