May I ask what test method are you have?
Your method my not be for free chlorine. OTO the yellow test does total chlorine. You need a method that does free and total chlorine.
Chlorene source for shocking?
Rember shock is a verb. It is an action we do to a pool. Pool stores have turned it in to a noun.
How much stabilizer did you put in?
Stabilizer or CYA takes days to desolve in to the water so you may getting a higher result in a few days and may over shoot your needed level.
ph
If your ph is at the bottom of the scale for your tester your ph could be lower than 6.8. I would get some muratic acid in there soon.
Steve
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