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Thread: First test on new water

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    First test on new water

    I just got my test kit and did all of the tests. My results below:
    24K gunnite, replastered Sp.2007
    Just to make sure- According to the Pool Calculator, it says I need to replace 50% of the water to lower the CYA. The hardness test says I should replace 40%. I just want some assurance before I replace 12K gal. of water. Thanks
    1) 24000 gal
    2) DE filter
    3) IG
    4) plaster
    5) 1 hp

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: First test on new water

    You don't have to replace any water, though it would probably be a good idea. The recommended CYA level is from 30-50, but CYA up to 80 is manageable. Similarly, the recommended CH level is from 250-350, but 430 is manageable. Personally, I would do a 20% water replacement now and then leave the rest for next season. But you can manage with your current levels, or do the 50% replacement.
    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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