Thanks so much, is there a way to tell female from male Cuban cichlids when they are young or no?

I currently have a male Cuban in with a female blood parrot and a female Jaguar that is being grown out to be moved when she is too big. There is also an albino channel cat and a common pleco in with them and I have total peace. From what I’m told that is rare though. Normally they very aggressive. I found a great balance and I’m not messing with it. My male is a little shy sometimes but still aggressive. I’m almost positive my success comes from housing only one male with all females, and having the tank divided with the jag on an opposite side for almost 6 months before he broke the divider down and they were just acting so peaceful and happy I left it down. Months later they are still happy. So it will depend on the fish, but a 75 gallon will be just fine for a pair of Cubans. Or a male with a female something else. But I’d divide them first to get used to each other.
