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Thread: Partial drain restart help

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    Partial drain restart help

    Ok here we go. I had a CYA of around 180 & just finished partial drain and refill. I tested water with K-2006 then took water to pool store for test to compare results.

    K-2006 results
    Fc 4
    Cc 0
    Ph 7.8
    Ta 160
    Ch 20
    Cya 30

    Pool store results
    Fc 3.3
    Cc 0
    Ph 8.1
    Ta 190
    Ch 50
    Cya (said they couldnt test it because ph and ta were out of wack)

    Pool store says add 9 qts 14 ozs of muratic acid. 17lbs 8ozs of calcium plus.

    Pool calculator says 55ozs of acid and 625 ozs of calcium plus 39lbs..

    Help please...

    Brandon, MS
    20000 gallon in ground vinyl
    sand filter
    hayward super 2 - 1 hp pump
    Brandon, Mississippi
    20000 Gallon Vinyl Inground
    Sand Filter with Hayward Super 2 - 1 HP pump
    K-2006 Kit

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    pwrstrk's Avatar
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    Elverson Pa.
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    Partial drain restart help

    Take the pool store results and throw them away. I never heard you can't test CYA because your PH and TA are out of whack.
    Everything looks good with your test results. Trust them.
    You have vinyl liner pool. Low CH is fine.
    Don't let your FC fall below 2. I would target 5. You may want to bump your CYA up to 40 if your pool sees a lot of sun. Better protection from the sun with a CYA level of 40. Then your FC levels would be a target of 7 and never below 3.
    Keep your PH in range and if it needs lowered that will also start to lower your TA. 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Richard320's Avatar
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    San Dimas, CA (LA County)
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    Re: Partial drain restart help

    If you have a vinyl liner, you don't need Calcium. So save your money.

    A quart of Muriatic Acid will bring your pH down to 7.5. Nine quarts would drive your pH down to about 4.5! Don't listen to the pool store anymore. Their testing stinks and their advice is worse.

    Assuming the water looks clear, go swimming.

    Always trust your own test results, and learn all the intricacies of poolmath. If you plug in your selections in the setup down low on poolmath, it will give you recommended levels.
    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: Partial drain restart help

    Well I added some calcium so that is money wasted but its ok, because I know better now. I added recommended acid from pool calculator. I have a good many trees so pool is rarely in 100% sun. Do you think I still need to bump up cya?

    Brandon, MS
    20000 gallon in ground vinyl
    sand filter
    hayward super 2 - 1 hp pump
    Brandon, Mississippi
    20000 Gallon Vinyl Inground
    Sand Filter with Hayward Super 2 - 1 HP pump
    K-2006 Kit

  5. Back To Top    #5

    Re: Partial drain restart help

    Pool is clear by the way.

    Brandon, MS
    20000 gallon in ground vinyl
    sand filter
    hayward super 2 - 1 hp pump
    Brandon, Mississippi
    20000 Gallon Vinyl Inground
    Sand Filter with Hayward Super 2 - 1 HP pump
    K-2006 Kit

  6. Back To Top    #6
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Partial drain restart help

    Quote Originally Posted by Chaddyp59 View Post
    Well I added some calcium so that is money wasted but its ok, because I know better now. I added recommended acid from pool calculator. I have a good many trees so pool is rarely in 100% sun. Do you think I still need to bump up cya?

    Brandon, MS
    20000 gallon in ground vinyl
    sand filter
    hayward super 2 - 1 hp pump
    If you lose more than 3 ppm FC every day consistently, then consider going up a bit. Every pool is different. Be sure to leave room for pucks in a floater, in case you want to leave town for a few days any time during swim season.
    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!

  7. Back To Top    #7
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Partial drain restart help

    It's your call. If your losing too much FC from the sun, more than 3 ppm a day, then bump it up. The range for a non SWG pool is 30-50. Sorry Richard beat me 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  8. Back To Top    #8
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Partial drain restart help

    Beat you!
    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!

  9. Back To Top    #9

    Re: Partial drain restart help

    Thanks guys!! Great forum!!!

    Brandon, MS
    20000 gallon in ground vinyl
    sand filter
    hayward super 2 - 1 hp pump
    Brandon, Mississippi
    20000 Gallon Vinyl Inground
    Sand Filter with Hayward Super 2 - 1 HP pump
    K-2006 Kit

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