One thing to consider might be your tap water parameters
Festae come from the soft, neutral pH of the Rio Tumbes, west of the Andes
Argentea come from the hard, higher pH (7.5 to 8) waters of Mexico.
I have kept both, and both and to me, they are equally attractive.
I agree with Kevin, that the best way to raise them, would be to get a half dozen juvies, of either species, and grow them out together allowing a pair to form and bond on its own.
Festae come from the soft, neutral pH of the Rio Tumbes, west of the Andes
Argentea come from the hard, higher pH (7.5 to 8) waters of Mexico.
I have kept both, and both and to me, they are equally attractive.
I agree with Kevin, that the best way to raise them, would be to get a half dozen juvies, of either species, and grow them out together allowing a pair to form and bond on its own.