Well at least you tryed, been born to soon, plus they will need excellent water stats and you have desease in your tank, whitespot, and popeye.
The eggs won't survive they needed there mother to grow inside, like us a mother dies and the baby not devoloped no chance of saving the child, let the other fish eat them, or remove them with a net.
The fish that are you say fully grown though i doubt it, crushed flakes, and baby brime strimp.