It seems she hasnt given you good advice, the males will chase the females relentlessly possibly to death. Really you should have 2 or 3 female to 1 male and venustus get big really big. My advice to start would be take the female venustus and acei back because they will cause aggression and swap them for 2 or 3 more male acei. If the yellow fish are yellow labs id do the same with them take the female back and get a couple more males. hope it works out.