I only make a small amount to last a day, and make a new batch every day, only takes a few minutes. It is much better to feed lots os small feedings throughout the day than a few large ones.
I also let algae grow on all surfaces so the fry can graze in between.
And this works well withe the artemia, because they don't all hatch out at once, so a hatching container container of artemia eggs migh take a couple days to use.
I usually start the hatcheries every 2 days or so until the fry are totally weaned onto larger non-live food.
Even after a hatchery seems used up, I pour whats left into a container outside in the sun with some old water change water, and any unhatched eggs usually hatch, then grow a little and are used for snacks for older fry or small adults.