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Thread: Pool opening. What order the chemicals need to be added?

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    Pool opening. What order the chemicals need to be added?

    I can't find a post which explained which chemicals need to be added and in what order. I remember seeing one, but can't find it anymore. I remember it mentioned the order in which chemicals need to be added and the intervals.

    I'm about to open my pool and I have FT-100 from last year which may or may not be good. What do I need to check\add first? I understand it all depends on water reading, but assuming some or most are off should the chlorine go in first regardless or should something else be adjusted first (if needed. cya,ph,etc..)? This is my 2nd season and I went through **** last year with leslies so I'd like it to be trouble free this time

    Thanks
    Bill
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

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    JasonLion's Avatar
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    Re: Pool opening. What order the chemicals need to be added?

    The best thing is to post PH, TA, and CH test results from your fill water and we will walk you through the whole process.

    Basically, if TA is really low raise it to at least 50.
    If PH is really low or really high get PH basically in range (7.2 to 7.8).
    Add chlorine.
    Add CYA.
    Fine tune everything more slowly as needed. Try to do CH on a day when nothing else is happening.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Pool opening. What order the chemicals need to be added?

    Chlorine 0
    PH 8.2 or more
    TA100
    Calcium 500-600
    CYA 70 (not 100% positive on this one. Will need to get supplies and test again)

    the test kit is from last year. Pool was opened 4 hours ago and pump was running for about 2 hours

    What do I need to do first, add chlorine or lower PH?



    Thanks
    Bill
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

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    Richard320's Avatar
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    Re: Pool opening. What order the chemicals need to be added?

    pH.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Pool opening. What order the chemicals need to be added?

    Quote Originally Posted by Richard320
    pH.
    How soon can I add chlorine after PH has been adjusted?
    Bill
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

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    Richard320's Avatar
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    Re: Pool opening. What order the chemicals need to be added?

    Quote Originally Posted by LeeM2
    Quote Originally Posted by Richard320
    pH.
    How soon can I add chlorine after PH has been adjusted?
    Give it half an hour at least. Another good way to judge is by adding acid, then grab the brush and go around the pool once, brushing the whole thing. Guaranteed it will be thoroughly mixed by then, and you can go ahead and dump your bleach in.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Pool opening. What order the chemicals need to be added?

    Interesting thing - according to aqua chem test kit PH is at 7.6 or so, while Taylor now shows 8.2, maybe even 8. I ran pump for a few hours.
    Both kits were purchased last year
    Bill
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

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