I heard about a couple Stweartii they used do do it a couple of months untill they had spawned...... so i keep waiting and looking at them while they f**k...
) my male also haves a vivid coloration on the head he is more blue on the head and the back than her.... i will keep you updated if something new happens
It took my sp. "assam" several times to get the spawning right so maybe you will get fry eventually...