I've been meaning to read that article but haven't gotten around to it yet.
I think there is a good possibility the eggs either had fungus (although they looked perfectly fine to me) or they weren't fertilized. Like I said before this pair was very.. awkward. They didn't spawn for very long and there was only one good embrace that I saw (13 eggs), the rest only yielded 4-7 eggs a piece. While I didn't condition Ada specifically, while Jane and Rio were being conditioned everyone was being fed frozen so for two weeks pretty much all my fish got conditioned. I don't think that was the problem. With two unsuccessful spawns, however, I probably won't try these guys as a pair again.
I really like Rio and I really like Ada. I'm hoping I can maybe get my hands on a marble sib pair to breed and then breed the male to Ada and the female to Rio as well so I don't lose their genetics.