My usual angelfish breeding routine is to remove the eggs to a separate bare-bottom 10g hatching tank. I don't like to move the fry around too much when they're little. Some people use a 2g or 5g hatching tank, but that isn't big enough for early feeding & growout. Once they're big enough that they look like mini angels, they're pretty resilient.
These particular eggs (and all the earlier ones from these parents) were already eaten. I haven't actually raised any since moving back to Idaho 2 years ago.
My "real" goal is to get the parents to raise their young in a heavily planted tank. In order to actually do that, I'll need to find a new home for the others and a find a better place for the breeding/rearing tank. I have a 2 year-old son and that's fairly contrary to keeping them in a nice, quiet environment.