frozen baby brineshrimp for 2-4 weeks, (or u can hatch your own), then frozen Daphnia for another 2-4 weeks before adult brine shrimp. However I have had success by getting fry to eat crushed flake food very early-on so in this case, as per
tlindsey
's suggestion, since the crushed flake has far more protein and nutritional value getting them to a crushed flake or crushed pellet food will have unlimited benefits to you.
The Brasiliensis fry are pushing 1/2" already and it's only been about 3 months. I got them eating pre-soaked Hikari Bio-Gold+ too the point it was soft and pliable when I put it in their tank so they just bite of little bite-sized pieces at their own leisure and the leftovers sit there until they get hungry again. 45% crude protein for fry offers an exceptional growth rate from what I have been seeing.