This really depends on what you want these fish to do. If you just want to look at them and have a great tank, then mixing is fine. Like Kim said, if you plan on breeding them, you can't trust that just because a female Jalo has a mouth full of babies that they came from your Jalo male. In my show tank I have many different kinds of cynos and they are great together. I don't keep any fry from this tank, if I want fry I move a group to a 30 and wait. Like spyder said, pay attention to the ratios and enjoy.