I have not heard this before. I did not know they had a preference. Felipe you or anyone have more info on this?
not really, i read that some time ago when i had the problem ( let me look it ), and in my personal case it is semmed like real, my first problem was my purple nana, inmediatly my two tricolor.
I remember perfectly what the comentary or article said... that this plague could live undetectable in our tanks for much time, because some acros have more mucus and other conditions

idea:don´t remember?)than others than have it more resistant and fast recuperation, but after a time, the proliferation of the AEFW exceeds the acros recovery capacity and is until this moment when we detect the problem; and it say somethink like: "if you belive you don´t have this pest in yor thank and you don´t have a tricolor acro, you can get one to check if you really don´t have it"....
now you asking me... i think if the AEFW really have a preference for the tricolor and purple acros, or this kind of acros are less inmune to the AEFW, and it appear more fast more concerned.
My personal case,, i did the Procoral Cure baths, and added a Camel shrimp at the display ( ERROR! after a time it started to eat my acans ) i left it at the Sump. after that newly i had have more evidence precisely in my purple tricolors acros.
my purple nana when was affect:
out fo the water it not appears be so bad, but closelly and in the water was other think, the base started to turn brown and decayed, the purple intensity estarted to less, and after the Procoral Cure bath it almost lost all the color.