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Thread: Chlorine vs PH vs Alkalinity vs CYA

  1. Back To Top    #1

    Join Date
    May 2016
    Albany. NY

    Chlorine vs PH vs Alkalinity vs CYA

    Hi everyone. I have a question about closing my pool.

    My Chlorine is high. 10+ range

    The PH is extremely low (6.4-ppm) and the alkalinity is pretty much non existent. The CYA i around 100 ppm

    Can I still close the pool and not have to adjust????
    15' round above ground pool. Cartridge filter. BBB method :)

  2. Back To Top    #2
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: Chlorine vs PH vs Alkalinity vs CYA

    Definitely not. Get the TA up to 60-80 and pH around 7.5 first. More here on how to do that, Pool School - Recommended Pool Chemicals
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3

    TFP Guide
    Catanzaro's Avatar
    Join Date
    Jul 2014
    Howell, New Jersey

    Re: Chlorine vs PH vs Alkalinity vs CYA

    Please advise how your CYA is 100 when you are following the BBB method? Are you testing with one of the recommended test kits? Here at TFP, we rely on accurate testing. Thanks!
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Frog Mineralizer System (EMPTY) - Hayward Super Pump 2 HP Model # k48m2n111
    Pool Company tests water (NO LONGER) TF-100 TEST KIT
    Date of Build is 11-2013

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