If they are too small for the regular 1mm NLS cichlid pellets, then I use the .5mm NLS grow. I used to use flakes, but find that using the pellets increases growth pretty significantly since they end up getting more nutrients when they eat the pellets.
Up to about 1", I feed a combination of spirulina flake, NLS flake w/garlic, and NLS Grow. From 1" to 1-1/2", just the spirulina and grow, and beyond 1-1/2", NLS 1mm and spirulina. I've had very good success with this regimen.