H. reidi, like many pelagic fry, aren't large enough to be taking the brine nauplii so for the first part (for me it was the first two weeks) rotifers or small copepods fit the bill. As it is harder for sustaining copepod cultures most depend on the rotifers as the main first food. I usually went with a mixture of rots and brine for the second two weeks, before going just with brine after that.
I use Dan's Feed for enrichment of all rots and brine.
I use Dan's Feed for enrichment of all rots and brine.