40 B Nyererei. 2 males, 4 females. I moved sub male to diff tank to get health back. fins slightly tattered. Wanted to run 2 males 4 females, but might stick with just 1 male.
Suggestions on that? No females ever seem interested in the sub anyways.
Personally, I like to keep 2 males with a group of females when breeding, especially in a species-only tank (though not necessary). The females are going to only be interested in the dominant male. Having that second male helps to keep the dominate male from harassing the females too much by also taking up some of his time. He's often times not going to be in tip-top shape, but with some aquascaping so he's got places to hide and get away, he'll do alright. And having a second, you have a backup in case something happens to the first male, such as a "leap of faith" out of the tank one night on accident.
That said, for those particular fish, moving them to your 90 should definitely help. I'd try to aquascape the tank into thirds if possible, making one of the ends most desirable (so the dominant male sets up shop there - leaving the other portion of the subdominant male to find his own niche).
