I agree with Snorvich.
But you can keep a super male of another type of species without any issues.
Not the same, otherwise they'll fight to the death.
If you want the females to come out more, you may want to add 2-3 more to make it a harem. Once you do, with your male flame, he'll become a super male.
The female wrasses with pick on eachother, but they'll stopped after a while.
They shouldn't be doing it too long, once the discover there is a male in their community.