Once your 24 hours are up (you can leave it for longer) switch off the air supply. Leave it for 5 to 10 mins for the mix to settle out. You should see the hatched eggs floating on the surface and the hatched bbs swimming around in the mid level of your hatcher.
Stick the other end of your airline into a glass jug and use it to siphon the shrimp out of the hatcher. Stop siphoning before the water in the hatcher drops all the way or you'll siphon the hatched eggs as well.
I usually check at this point to see if I've had a good hatching. If not, I pour it back in and reconnect the airline and leave it for a few more hours.
Once in the jug, I add some more tank water to dilute the brine (more on this later) and let it settle under a lamp. (I use a desk lamp).
You will see all the shrimp swimming around, with unhatched eggs on the floor of the jar, hatched eggs floating on top.
I use a big plastic syringe with airline attached to suck up the live bbs. You can now run them through a coffee filter paper to get rid of the liquid, then feed them to your fry - just turn the filter inside out and rinse it in your fry tank. If you don't mind a bit of brine in the tank, you can miss out the filter paper and just squirt the bbs straight in to your tank - one reason why I dilute the brine.
I usually add more tank water and small amount of salt back into my hatchery, reattach the airline and leave for a few hours, then empty the whole lot into an empty jug, again diluting the brine with more tank water, then repeat the settling/syringe/syphon process.
