These are a couple of dry foods (.5mm &1mm) I have had success with raising my baby clowns. Hikari makes a frozen mysis shrimp cube pack that has smaller shrimp. If you find they are too big take a frozen cube and with a razor blade slice the shrimp cube into bite size pieces until your fish are big enough to handle the whole shrimp. If you want them to grow fast feed many small servings per day. When I grow mine up for sale I would try to feed 6X per day. Only what they could consume before any food would reach the bottom. Good luck with those beauties.