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Thread: Newbie with new test numbers - what to tackle first?

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    Newbie with new test numbers - what to tackle first?

    I just completed my second partial drain and refill due to sky high CYA and TA. Here are my new numbers:

    FC = .4
    CC = .4
    PH = 7.6
    TA = 275
    CH = 175
    CYA = 55

    The water has a greenish tint to it after refill. Do I need to decrease the ph more before beginning the SLAM process? Approximately how long does it take for chlorine to increase? Thanks in advance!
    30,000 gallon, 20x40, IG, vinyl, sand filter

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    Mod Squad zea3's Avatar
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    Re: Newbie with new test numbers - what to tackle first?

    You can decrease the pH more if you want, but it is fine where it is. You should be able to see an increase in chlorine after it is allowed to mix into the bulk of the water, approx 15-30 minutes after adding in front of the return with the pump running.

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    Last edited by zea3; 06-24-2015 at 05:54 PM. Reason: delete duplicate info
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Mod Squad kimkats's Avatar
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    Re: Newbie with new test numbers - what to tackle first?

    Yes, take your PH down to 7.2 for the SLAM. As soon as you get your PH down start the SLAM.

    FC increases as soon as you add the bleach/chlorine. You should wait about 15 mins of the pump running and mixing the water before you test your FC to make sure you added enough.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Defgufman's Avatar
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    Re: Newbie with new test numbers - what to tackle first?

    I'd put 90 ounces of 31% acid in and engage slam mode.
    Inground 13,200 gal Vinyl, Pentair 3/4 hp pump, Pentair Sand Dollar filter, Polaris 280

    Pool School, Pool Math, CYA to FC ratio chart, Testing Kits

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