Stoyan, this is reading like a thriller story. Maybe we can make a movie from all these events.Sorry for my late response and thank you for following along. The good news is the tank is still alive . The baths with ReVive and other products based on essential oils did't worked for me. First weeks after the bath Acros were OK but after second treatment they start loosing colors, STN started, and they died. This was long painful period that coincided with busy period for me, as a result the other no acro corals and algae took advantage and overgrown tank. This period ended a month ago when I saw in LFS young Halichoeres leucoxanthus (known as Yellow & Purple Wrasse or White wrasse or Four Spot wrasse or Canarytop wrasse or Whitebelly wrasse or Lemon meringue wrasse - Ooops, I think this fish held the record for many common names ). This small and very active fish solve my AEFW problem in just few days. The last remaining Acros became bright again and showed polyps. The reason I did't did this earlier is I have no sand and my tank is open top. But I find lack of substrate not a problem for this wrasse because all the rocks are lifted 1 inch off the bottom and he is sleeping on there. The only compromise I did is to cover the top of the tank.
Once the flatworms were in control I've started to "clean and cut". During this cleaning process three weeks ago I've got pretty nasty electric shock because of malfunctioning titanium heater (we still dont know what happened exactly), I was thrown clear of the tank by this violent muscular contraction I lost conciseness for short period and my left arm was not really functional for two weeks. But I've survived (again) Off course this did't stop me and two days after I've finished the work (my right arm helped a lot ) now the tank is clean and recovering, me too.
Lessons learnt? Yes, first one: -young yellow wrasses are a must for mature acro tank and the second one - 220 Volt current in the tank is not good idea.
For my coming over 200 gal project there will be no stuff working on more than 12-24 volt for sure.
We are happy you and the tank survived so far.
And thank you for the info because also on my next purchase list... Halichoeres leucoxanthus.