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Thread: CH Level UP ?

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    Patrick's Avatar
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    CH Level UP ?

    Since my conversion, I've been holding a CH level of 250 for the last few weeks. I have not added any calcium since the initial dose.
    Did my weekly test today (using TF-100). Tested the CH level again two hours later and still the exact same result. The pool looks great.

    FC- 7
    CC- 0
    PH- 7.7
    TA- 120
    CH- 360 (both times)
    CYA- 50

    I'm worried that if it continues to rise that I will begin to have problems.
    Any advice?
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    Patrick - Central NJ (15th Season)
    19 K Gal. Free Form Gunite/White Plaster Finish
    Nautilius DE Filter (48 sq. ft. grid)
    Whisper 1 1/2 HP Pump
    Pentair MiniMax CH 250M Natural Gas Heater

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    frustratedpoolmom's Avatar
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    SWSuburban Chicago, IL
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    Re: CH Level UP ?

    As long as you keep your PH 7.6 or less you won't have a problem. Is your fill water high in CH?
    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
    http://www.PerfectlyClearPoolService.com

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    Patrick's Avatar
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    Re: CH Level UP ?

    I lowered the PH a bit. I don't know what the CH level is on my fill water,
    but I haven't had to add any in the last couple weeks because of all the rain that we had.
    Patrick - Central NJ (15th Season)
    19 K Gal. Free Form Gunite/White Plaster Finish
    Nautilius DE Filter (48 sq. ft. grid)
    Whisper 1 1/2 HP Pump
    Pentair MiniMax CH 250M Natural Gas Heater

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    duraleigh's Avatar
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    Re: CH Level UP ?

    Patrick,

    There are really only two ways for CH to increase:

    1. Your fill water is very high in CH and is causing the increase

    2. You are adding it.

    Obviously you are not adding it on purpose. Are you using Cal Hypo to chlorinate? If not, I suspect a testing error....either on the current tests or, more likely, on the older ones.

    BTW, your water is spectacular!
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: CH Level UP ?

    Remember that you can compensate for high CH by lowering the TA!

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    Patrick's Avatar
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    Re: CH Level UP ?

    I have been using just Clorox Bleach to chlorinate.
    I will try to lower the TA a bit.
    Patrick - Central NJ (15th Season)
    19 K Gal. Free Form Gunite/White Plaster Finish
    Nautilius DE Filter (48 sq. ft. grid)
    Whisper 1 1/2 HP Pump
    Pentair MiniMax CH 250M Natural Gas Heater

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