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Thread: Crystal Clear Water - Chems out of whack!?

  1. Back To Top    #1

    Join Date
    Jul 2010
    N.W. Indiana

    Crystal Clear Water - Chems out of whack!?

    Alright, got my TF-100 and tested my pool because of suspected high CYA creating problems. Here are the results. Not sure what to tackle first. Got clear water...but I know the below stats are not real good. Thanks for the assistance in advance.

    20,000 gal
    In-Line Chlorinator
    3" tabs

    FC 2.5
    CC 1
    TC 3.5
    pH 6.8
    T/A 70
    CH 200
    CYA 110
    Temp 88
    15.5K gal, 525 sqft, gunite, Pentair 520 sqft cartridge, Pentair VS-SVRS, Pentair 400K BTU, Kreepy Krauly Legend, Rainbow in-line, Easytouch, Sunstone

  2. Back To Top    #2
    svenpup's Avatar
    Join Date
    Nov 2009
    Sacramento, CA

    Re: Crystal Clear Water - Chems out of whack!?

    Throw away the pucks...50-60% drain and refill to get CYA down...then retest and repost.

    Your pH of 6.8 is very low, and since it is at the bottom of the test scale it may actually be much lower than 6.8. If you are going to drain and refill immediately you can fix it after you refill. Otherwise you should bring the pH up with borax. Since you really don't know how low it is it may take much more borax than you think.

    Your FC is low, and presence of CC indicates a need to shock. This will be next to impossible with CYA > 100.
    TFP Method Advanced Intermediate
    • 17,500 gallons - In Ground - Plaster - Hayward Swimclear 3020 Cartridge Filter - Sta-Rite Max-E-Glas Main Pump upgraded with A.O. Smith B2980 E-Plus New Centurion Two-Speed Motor - Polaris 280 Cleaner with Polaris PB4-60 Booster Pump - TightWatt2 Timer - Taylor K-2006 Test Kit - Pool Pilot Digital Nano SWCG

    Helpful Links: Pool School, BBB for Beginners, How to Shock ('s a process not a product), Chlorine/CYA Chart, Jason's Pool Calculator

  3. Back To Top    #3

    In the Industry

    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: Crystal Clear Water - Chems out of whack!?

    Sven summed it up in a nutshell.
    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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