Hi, John,
I think I'd adjust my ph first. If it's waaay out of whack, the sooner you get it right, the better. It is possible the chlorine will be more effective with your pH in that 7.2 - 7.6 range as well.
Actually, your pH, if not too far out, will adjust nicely in a half day at most. So you could adjust your pH in the AM and then add chlorine that evening to be most effective.
You would do well to post test results for Cl, pH, Alk, and CYA before you add your chemicals...it'll help you get off to a great start.
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