Okay...I guess I wasn't clear enough in my question.
For a minute forget the hang up on whether its S.Heckel genetically.. or technically...
Simplified explanation...
In the beginning ....there was a wild Blue/Brown discus...It was a beautiful creature with a unique character... it was a wild that by today's domestic standards needed improvement...so it was "improved", even though back then...we didn't know that it needed improvement and much of what was done was probably chance.... It was manipulated and selectively bred to look like something it was not originally designed by nature to be.....today it is a Blue diamond, a red Turq, a leopard, an albino, a mellon, a Pb,, a cobalt, a snakeskin, a san merah, a rose red, a millenium gold, an altum Flora, a bulldog....anything but what it started out as.
In the beginning .... There was a wild Heckel...It was a beautiful creature...with character...It was a wild that by today's domestic standards....
The challenge in Breeding our Tank raised Heckels may turn out to be not the act of breeding them... but to Not "improve" them as we did our current domestic wild blue /brown derived discus
hth,
al