When I used to breed Corys, I would condition the adult school of 5-7 in a 20 gal long tank with a bare glass bottom. I would feed them Brine Shrimp & Blood worms in addition to their normal diet. After about a week, I would do a 40-50% water change with slightly cooler water to simulate the "rainy season" in the Amazon. Like clockwork, they school would start spawning. After they were finished I would remove the adults to their normal community tank. I would then watch for any eggs turning white in color. These are unfertilized, and may spread fungus to verile eggs. I used to remove these infertile or fungal eggs with a small eye dropper. I fed the fry Wardley's Small Fry liquid food, because it was readily available and easy for me to use. I also used fish flakes ground up into a fine powder, or Egg Layer's powder for small fry. I always removed the adults, because they will eat the eggs. I never moved the eggs, because that didn't make sense to me.