Hi,
I am near the end cycle of Acro FW and seem to be doing well with very minimal losses far, however my tank does not look like yours as the FW inhibited growth and my system is fairly new (only 8 months old - my sps are quite young).
From my experience with these pests, in tank treatment doesn't work for AEFW... best way is to move all the coral to a holding tank and treat them every 5 days for 30 days. The idea here is to kill the adults then slowly kill all the hatchlings over time . The idea is to make a system which is friendly to work with in terms of removing coral and by having the DT empty of any acros (which is sadly most SPS); theese worms die in a couple of weeks if food is not present (i believe they feed on zooxanthellae)
The only other method is to house a nice selection of wrasses and use a turkey baster on daily basis and squart water on acros every day, also I suggest not feeding the tank as you want some hungry wrasses looking for food. You can also try some pipefish (I want a pair) as they are good coral cleaners as well.
Keep in mind the only proven method to clear out these pests is to dip every 5-7 days for a minimum of 30 days, the wrasses can not possibly eradicate the FW, just keep them at bay if they are trained to look for FW.
Also these suckers are mostly nocturnal which doesn't help much as the wrasses are very stubborn and they always go to sleep at lights out.
My SPS were quite small 1" to 8-9" colonies and had no problem taking them off the rocks with minimal damage. I setup a 20g long QT tank and used 60% DT water along with some biomedia filter I had in the sump seeding for a long time. For filtration I use wheel filter along with a nano skimmer (i also QT fish in this tank).
I used one of my old gen one Radions to light up this QT tank as I moved back to my T5 on the DT. Obviously there was bleaching and lost a small .75" and a small no name colony, but all coral seems to recover. I am a zeovit user and I have a feeling this helps with the health recovery of the coral.
Check out my thread on
Zeovit Forum as it might give you some ideas on a QT tank
Also, I know this is a pain, but I strongly suggest running all new acquired coral through a QT for at least 30 days (I prefer 60 days)