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    Do I need to drain my pool?

    Hi! I took a sample of water to the local pool store and they said that I need to drain my pool. I have a 11,000 gallon Pebble Tech pool (chlorine). CH 600 CYA 120 TA 150 PH 8 TDS 5000+ ( they can't read anything higher than 5000) Thanks for any help!