Mine are in a tank with the adults and I make sure that I crush a bit of the flake each time I feed the tank. That way there is plenty of food suitable for the smallest fry.
I dont have fry yet karigupi (not that you'd know that from my post). I've got some males and I'm going to get them lady friends over the next few weeks; so hopefully I'll get some then. I'm just planning/researching early