Just NLS. I've seen my breeding females chew the pellets for the little ones. Although lately, I've mixed in golden pearl and decapsulated brine shrimp with NLS for all my tanks with fry in them; that seems to increase the number of fry that survive.
I feed mine Hikari Micro Pellets. It contains a mix of vitamin pellets, animal origin protein, and plant origin nutrition. The pellets are small enough that the multis can swallow them easily. They seem to enjoy them well enough.