I recommend using a more precise test kit. In my experience, the test strips are not accurate enough to justify cost or convenience. I use this with in ground pool and works great - available on amazon 👌.

https://www.amazon.com/Taylor-Swimming-Chlorine-Alkalinity-Hardness/dp/B001DNXK78/ref=sr_1_3?crid=19V1SSCOD9XUD&keywords=taylor+pool+test+kit&qid=1654327370&s=lawn-garden&sprefix=Taylor%2Clawngarden%2C127&sr=1-3

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Happy swimming!