What ive heard is that white Cory eggs are unfertilized so remove them. Eggs that are fertilized are tan and within the first day or two, the babies should be visible inside the egg. If you are not sure about this, wait a couple days and the unfertilized eggs will mold and can lead to infection to healthy ones. If they hatch, they do not need to be fed for 1-3 days because they feed off of their egg yolk/sac they are still attatched to. Hope this helped and good luck!:thumbsup: