Just in case someone gets confused here, you can't hatch "enriched" brine shrimp.
First you sterilize the cysts or decap them, and then hatch them out.
After hatching, you grow them out for a day to get them to the 2nd instar stage where then can begin eating.
Siphon off what you need, rinse them and put them in new salt water with new enrichment like Dan's Food (from seahorsesource.com).
They have a reasonable enrichment after 12 hours, but for best results, rinse them again after that 12 hour period and put them in new salt water and new enrichment again for another 12 hours.
Rinse and add to the tank.