cl=9
ph 7.6
alk 190
Cal 210 (hard water here in AZ)
cya 50
Those numbers look great, other than Alk! That's unusual for a new plaster pool.
Normal recommended FC (free chlorine) level for CYA of 30-50 is 3 to 6 and you shock at 15, but for levels of 60-90 is 5 to 10, shocking at 20.
So a chlorine level of 10 is fine.
pH at 7.6 is perfect--but to lower Alk you'll need to get it down to 7.0-7.2 and aerate.
Calcium is near the bottom of the recommended range for plaster pools--200-400, but with your Alk at 190, I wouldn't mess with it until alk is in the 90-125 range. Besides, you are WITHIN the range so you don't have to change it.
Still, you shouldn't have any problems with your current numbers, but I'm not a plaster pool guy, and I defer to anyone who is more knowledgable there.
But, again, I don't see any signs of trouble in your numbers--they look great!
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