They dont look fertile to me. Looks like they have started to fungus up, So the female will probably gobbles them all up soon.
I agree with Gruff, Breeding is instinctual, But males dont always do it right the first try. or 2nd, or 3rd. All depends on the fish. Being the hybrid that he is, I would doubt his fertility, But you never know.
If/when that male decides to get aggressive, Those tankmates wont last long. I wouldnt advise breeding in that sized tank. Personally, I would give him 1 more shot at trying to fertilize the eggs and if not, Either sell him or move him to another tank. A couple months that Carpintis will be the size of the RT and hopefully they could pair up for you, Because that would be a much better chance of fertile eggs.