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Thread: Confused need come help with CH and Chlorine

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    Join Date
    Jun 2014
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    Scituate, MA
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    Confused need come help with CH and Chlorine

    Hello,

    All readings were in range except CH. Confused, I just put some Hardness Plus into my pool to bring the CH from 175 up. Put in about 12 lbs. This morning CH 225. checked the chlorine this morning and it was low .5-1. Used the PoolMath and put in recommended 3 qts 2 cups 8.5% liquid chlorine at 7:15am. Now at 3:00pm reading no chlorine. ????? help what happened? What do I do? Pool store says typical "Chlorine Block" put in CYA.

    Thanks, Patty
    Gunite Pool Inground, Plaster, Built 1982
    20 x 40 paisley, 8 deep end, 3 shallow end, 26,000 gal - 30,000 gal ??
    Filter - Apolo Mode VA 38, 38ft, pressure 50lbs, flow rate 95 GPM, 22 lg., 40 deep, 20 wide
    Model No. C48K2PA105C5, 1 HP 115/230 3450 RPM 60 HZ

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    Mod Squad jblizzle's Avatar
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    Re: Confused need come help with CH and Chlorine

    Please post a full set of test results. If your CYA is too low, you will lose the FC to the sun quickly. If it is too high, you likely have not maintained the FC high enough and there is something growing in the water consuming the FC.
    Jason, TFP Moderator
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  3. Back To Top    #3

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    Jun 2014
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    Scituate, MA
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    Re: Confused need come help with CH and Chlorine

    CYA is low 25 at best. Just tested it.

    PH 7.6
    FC .5-1
    TA 70
    Gunite Pool Inground, Plaster, Built 1982
    20 x 40 paisley, 8 deep end, 3 shallow end, 26,000 gal - 30,000 gal ??
    Filter - Apolo Mode VA 38, 38ft, pressure 50lbs, flow rate 95 GPM, 22 lg., 40 deep, 20 wide
    Model No. C48K2PA105C5, 1 HP 115/230 3450 RPM 60 HZ

  4. Back To Top    #4

    Join Date
    Mar 2014
    Location
    Las Vegas
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    288

    Re: Confused need come help with CH and Chlorine

    I would bump your CYA up to 35. Add some chlorine to get your level up and then do an OCLT to see if anything is growing in there.
    12000 Gallon IG Plaster built 2/15/2014. Jandy 340 sg ft 127 gpm filter, Jandy 1 HP stealth pump. Circupool RJ-45 SWG (overkill). TF-100 with Speed Stir.

  5. Back To Top    #5

    Join Date
    Jun 2014
    Location
    Scituate, MA
    Posts
    25

    Re: Confused need come help with CH and Chlorine

    jimbradwell, what is an OCLT?
    Gunite Pool Inground, Plaster, Built 1982
    20 x 40 paisley, 8 deep end, 3 shallow end, 26,000 gal - 30,000 gal ??
    Filter - Apolo Mode VA 38, 38ft, pressure 50lbs, flow rate 95 GPM, 22 lg., 40 deep, 20 wide
    Model No. C48K2PA105C5, 1 HP 115/230 3450 RPM 60 HZ

  6. Back To Top    #6

    Join Date
    Mar 2014
    Location
    Las Vegas
    Posts
    288

    Re: Confused need come help with CH and Chlorine

    Overnight Chlorine Loss Test. http://www.troublefreepool.com/conte...loss-test-oclt will explain how to do it.
    12000 Gallon IG Plaster built 2/15/2014. Jandy 340 sg ft 127 gpm filter, Jandy 1 HP stealth pump. Circupool RJ-45 SWG (overkill). TF-100 with Speed Stir.

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