There is nothing as simple and as cheap as using inverted pop bottles with the bottoms cut off for hatching out brine shrimp cysts.
Avoid any hatchery mean for in tank hatchout as brine shrimp cysts, the hatching water and the newborn nauplii BEFORE rinsing under the cold water tap, should never contact your tank water. Brine shrimp cysts are very well known for harbouring nasty bacteria like vibrio.
While it's not always a problem, IMO it's not worth losing my tank contents just to be a little lazy.
Never use air stones to hatch and grow out the brine shrimp but rather use a piece of ridgid air line tube which you can insert into the upper opening and let it rest in the cap at the bottom of the bottle (inverted).
After hatch out of a day, I transfer the newborn nauplii to a larger container for grow out with container size depending on the amount hatched.
I decapp a heaping tablespoon of cysts with bleach and then hatch out. Once hatched, I rinse in cold water and transfer to a 26g container holding about 12g of water at 1.017, adding more water in time as the shrimp grow through the molts.
GROWING BRINE SHRIMP TO ADULT