you can keep a group of females together in harmony really althoguh if they are like mine they will decide who is boss but they will be fine after that!!
you can't keep females with males, it just doesn't really work. The male will either kill the females or they will gang up on him and kill him....so much for girl power!!
what catfish are they?
Cant see plecs or danios being a problem tho, can't really see the catfish being a problem either.