I'm a big fan of Jags but what about a Loisellie? They're smaller, colorful, and not as aggressive. Plus, you don't see them in the hobby very often.
If you are interested in CO2, research threads on Drop Checkers.
That 30PPM rule falls apart if there is enough buffering capacity in your water
Pure water is ph 7, and your RO unit should produce water that is close to that. Enough so that you will have to add minerals back depending on what your
Whatever your final choice is, the source of your breeders can make a difference in how desirable the offspring are.
Getting wild or offspring of