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Thread: Lower CYA?

  1. Back To Top    #1

    Join Date
    Mar 2009
    Galveston, Tx

    Lower CYA?

    I had used Trichlor for many, many years. I discovered the BBB method in March. The CYA had been running around 90. The pH had been stable since I began testing with the TF 100 kit. Chlorine jumped around. I use the pool very little, have never had a CC reading register. June 8 my readings were TC 7, pH 7.6, TA 160, CYA 90. I drained water from the pool today and after refilling, the readings are TC 7 pH 7.2, TA 130, CYA 65. I'm ready to work on the TA. Should I wait a few days to see how the pH fares, or should get it down to 7.0? I have a lot of aeration built into my pool.
    23 K Gal
    2 Hp Pentair pump
    Filter: DE Nautilis FNS 60

  2. Back To Top    #2
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: Lower CYA?

    Interesting title choice - your issue is about your TA, since your CYA is now more acceptable

    I would leave it alone, monitor your levels, and as the PH rises to 7.8 use acid to lower it back down to 7.2. Each acid addition will also lower the TA. Eventually both should be where you want them, at the recommended level. No reason to rush the process, your numbers don't look bad at all.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    Perfectly Clear Pool Service, Find me on Facebook!

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