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Thread: Confusion as to why my chlorine level is not increasing

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    Confusion as to why my chlorine level is not increasing

    New pool and still trying to get the hang of the chemical balance. Results based on Taylor k2006 test kit, taken this morning:

    FC 1.5ppm
    CC 0
    PH 7.8
    TA 225
    CYA 60
    CH 40

    Based on the CYA/Chlorine Chart my target FC shoudl be 7ppm, using using pool math it suggested I add 121oz of 10% Pool Chlorine (bleach). Just went ahead and added a full gallon around 10am this morning and just checked results are FC 3.5ppm and CC 0. I was expecting it to be higher and know that this is not an exact science, but is it possible to have burned off that much chlorine 4 hours? Is my pool volume off, using the calculator below pool math?

    It seems like I am burning off around 2-3ppm chlorine everyday and my CYA, went from 40 to 60 in one day and not sure why on that either (could of been me, that test is hard to read).

    Thanks,

    Scott
    June 2016, 32x16 IG, approx 16k gallons, Plaster, DE, Jandy dev60 filter, Jandy 2 speed pump and Taylor K2006 test kit.

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    Mod Squad YippeeSkippy's Avatar
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    Re: Confusion as to why my chlorine level is not increasing

    Is the pool chlorine old? If its older or stored outside in the heat and sun it can certainly have lost potency.
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    bmoreswim's Avatar
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    Re: Confusion as to why my chlorine level is not increasing

    When did you add the CYA since you just started with your pool? It can take up to a week to fully register depending on the circumstances - so if you added it recently that could be the reason for the increase - otherwise it's just user error while reading the test. Nothing else will cause CYA to rise. Also, chlorine is a consumable, it will never "hold" throughout a day. A normal pool uses 2-4 ppm per day.

    If you had purchased the TF-100 test kit, you would have received a reagent that shows you exactly what 50 ppm of CYA looks like. This is one reason why the TF-100 is the best value, that and having bigger sizes of the reagents you will use the most.
    18'x38' Rectangle (3'-8 1/2' deep w/ diving board) - 27K gal. w/ gray plaster
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    Re: Confusion as to why my chlorine level is not increasing

    I will order that kit if it's easier to read the CYA. The Taylor kit seems like it has to many variables on that particular test. Although I did purchase the speedstir and that makes a world of difference on the other test.
    June 2016, 32x16 IG, approx 16k gallons, Plaster, DE, Jandy dev60 filter, Jandy 2 speed pump and Taylor K2006 test kit.

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    bmoreswim's Avatar
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    Re: Confusion as to why my chlorine level is not increasing

    The variability in reading them is the same, just that with the R-7065 CYA Standard Solution from tftestkits.net, you can see what 50 looks like. This can be ordered separately but I'd order it along with the chlorine test drops/powder, pH red, and additional CYA liquid since those run out first.
    18'x38' Rectangle (3'-8 1/2' deep w/ diving board) - 27K gal. w/ gray plaster
    Hayward equipment (cartridge filter, 2-speed pump, SWCG, automation) View Our Build
    Coverstar automatic pool cover | StoneMakers concrete retaining wall and decking
    Spring 2013 Build | Dolphin Active 20 robot cleaner | Support TFP!

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