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    Is it possible that Leslie's pool tablets don't have CYA?

    I used tablets for years. After battling algae problems, I found this wonderful site and learned about CYA. I drained my 27K gallon pool and restarted spring 2019. All went well last summer. At the start of this season, I checked CYA and it was low. Since I was out of CYA proper, I thought...