I have done it one three levels, 1) research facility with hundreds of tanks, 2) large tank of fish 3) casual for just a few fish.
equipment necessary for each varies. You will need an air bubbler For all methods. For casual, i like the little brineshrimp hatchery where the hatched brine shrimp swim to the light.
for just one or two tanks i make my own cones using inverted soda bottles. If you are getting serious i suggest ordering cones like this
Large Brine Shrimp Hatchery Cone with Stand, 2-Liter capacity. Equipped with stopcock (valve) for draining and harvesting. Also includes air hose and rigid tubing!
www.brineshrimpdirect.com
bleaching is suposed to increase yield but i have never really bothered. For all three, make up sea water using ro preferably, (but i have used tap) and 35grams salt (the best is instant ocean) per liter of water.
add water and eggs to the cone, insert the bubbler and make sure it goes down to the bottom and keeps all the eggs shifting.
the more eggs, the more dense the stock and more likely it will be to get gross. Eggs hatch in 1-3 days depending on temp, the brine need light to hatch.
it should not stink when you collect the bbs.
to collect, remove bubbler wait for eggs to settle, drain unhatched eggs, collect middle layer (bbs) then pour off hatched egg shells. Wash cone every time. You will need multiple hatchers set up 12 hours apart ( for feeding twice a day) use fine net to drain and rinse bbs, we used to use a piece of tshirt held over funnel. resuspend bbs in tank water and feed, if you make too much, you can chill in fridge for 12 hours or freeze in ice cube tray.