Thanks for clarifying. I was caught off guard by the other person's demand for a source (I always figure people will google), but now that I scroll back up, I see my original statement was, "revert back to female coloring." I've seen gorgeous squareback males look like crap after a few years solo in a tank. Hard to claim "my own eyes" as a source if someone does not want to believe, so I appreciate someone else saying they've noticed it, too. I didn't realize it was the same with bimacs, which I'd like to have someday. I think both females and males of that species are spectacular!
Might even be worse with bimacs. My two males are not as colorful any more even WITH females.