First pH, then FC because you can do this in a day before algae takes over, then CYA (this will take far longer, up to a week).
If your pool is vinyl, don't worry about calcium unless it's too HIGH. If it's hard rather than vinyl or fiberglass, you can add calcium or chlorinate with Cal-Hypo rather than bleach. You can do that with vinyl as well but you don't have to.
You also need to worry about T/A and get that in balance.


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