To overcome the bacterial problems that can come from brine shrimp cyst, you can soak the cysts in a bleach bath made by adding a tablespoon of bleach to a gallon of water, for a time of 30 minutes.
You can also use decapped cysts, also done using bleach but a lot more complicated.
However there are reported problems with empty cysts lodging in the digestive tracts of fish, blocking the digestive sytem.
Still safest to hatch and separate the nauplii to add to the tank.