Thanks for the response Mike.I don't recommend keeping both sexes of apistos in community tanks. They often cause problems with other members when they decide to breed. Macs are what I call 'casually polygamous'. This means that males will breed with any female who is available (and accepted by the female), but does fine living with just one female. This, of course, varies with tank size and decor.
My pair of macs were introduced to a tank with a few Rams and they put them in the corner of the tank very quickly. Good luck.