Neolamprologus Tetracanthus (Pearl-Lined Cichlid) fry just hatched... what do I feed them?

I just walked over to the tank and saw about 100 new fish swimming around in a cave. I have seen the male eating a few of them so I pulled about 50 or so out and put them into their own tank. However, I am unsure what to feed the little guys. I have some freeze dried brine shrimp, tubifex worms, blood worms, and regular and cichlid flake. Are any of these foods suitable or do the fry need something else?