I also have Kribs and they have spawned 3 times now, they are notorious for it and make excellent parents. Just let nature take its course, I have found that the male tends to the fry unfortunatley i have not had any successfull upbringings yet, they tend to either die off your other fish will probally see them as food.
i would maybe buy some liquifry other then that theres not alot more you can do.