I've built 2 successful hatcheries for BBS. The brine seem to start disappearing at about 5-7 days old. My question is how to raise them to become adults. Also, what foods do they eat. I put rotifers in there. Do they eat them?
They do not eat rotifers. They are filter feeders...bacteria, microalgae, etc
You can't raise them in the hatchery They'll need a larger tank, frequent water changes (they poop and molt a LOT) and constant feeding (they eat a lot).
OK. I've bathed the live ones in a bit of Selcon for a day or two. Does that enrich them enough for the fish? If not, should I just stick to the frozen and only feed live for treats every once in a while?