Baby Brine will keep them alive but they are deficient in fatty acids. As a result Banggai raised on Brine Shrimp have a risk of "Sudden Death Syndrome" if they are frightened for any reason.
I feed mine Frozen Prawn Eggs, live Copepods, live Cleaner Shrimp Larvae, and the recent addition of frozen Cyclop-eeze.
When they get large enough I begin to feed them minced scallops, squid & Salmon fat soaked in Cod Liver Oil.