I with Stuginski on this one. I had AEFW bad (despite dipping everything incoming always - a lesson about the difference between dipping and QT) and after a year of inconsistent and insufficient efforts it got to the point where it was either toss all acros (not going to happen. I love me my colored sticks) or form a new strategy.
Once a week for six weeks straight I pulled every acro out of the tank and did the recommended dip in Melafix Marine. 10mls / l for 5 minutes. That combined with vigorous agitation dislodged adult aefw. Visual inspects for eggs and scraping to remove.
The last flatworms I saw were at week 3. It has been months since the treatment and I haven't seen any flatworms or bitemarks or damage since. I even dipped a couple of small colonies recently and there were no flatworms.
My acros were pale with poor polyp extension after 6 weeks of weekly dips, but all survived, including echinata, surharsonoi, hummilus, lokani and efflo. Melafix Marine, imho, walks the line well of being harsh on pests but not so harsh on corals.
Months later color is returning, though it's not where it was yet. Best of all polyp extension is nearly back to where it was.