CYA high after refilling pool??

there is no way just city water would have CYA in it.. where you able to see the black dot with the water all the way to the top?
 

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Pucks do raise CYA, but a bit slower than if you added some granular stabilizer in a sock per the Poolmath calculator . Plus, you may find the sock method near a return jet is more predictable. If you plan for an initial target of 30, you will be very close to that target. For your 10K pool, that would equate to 40 ounces (2lbs 8 oz) of stabilizer in a sock.

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To increase CYA via granular stabilizer, simply place the required amount as calculated by the Poolmath calculator into a white sock and suspend it near a return jet. You can squeeze the sock occasionally to help it dissipate. Once dissolved, it may take about a week for the CYA readings to fully adjust.
 
Yes CYA is LOW, so now want to raise it. Can I use pucks I still have to increase balancer at this point. FC 2.2, CC 0, PH 7.6, TA 70
The trichlor pucks would be an awfully slow way to raise CYA, especially considering the amount of sun you get in your location. If you don't have stabilizer in the water, the sun will burn up your chlorine too quickly, and then the pool won't be protected against algae and other organics.

You should add stabilizer directly. Most people use the granular product, put the appropriate amount in a sock, and tie it up near a pool return, where it will dissolve over a period of hours to days.
 
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