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Thread: I want to understand Pool Math

  1. Back To Top    #1
    Captain 776's Avatar
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    I want to understand Pool Math

    First of all, my water is crystal clear, better than it has ever been.

    My test numbers May 28:
    Salt - 3.11
    PH - 7.4
    Chlorine - bright yellow, more than the 3.0 on the comparator scale
    CYA - somewhere between 0 and less than 30. After 2 cups of acid and 2 pucks in pool for 3 weeks
    FC - 10
    CC - 1.0 turned light pale purple and only 2 drops, back to clear
    CH - 40
    TA - 40

    Dont know why my CC is 1 when my chlorine level is high.
    Dont know why my CYA is not increasing.

    I want to use Pool Math, but how do I know what to enter for the correct GOAL amount?

    SWG was always on Max, so I turned it down to 70% a few days ago, my chlorine level has always been off the scale for the 1.5 yrs I had this pool. I thought that was good, high chlorine = no algae ....is that a correct assumption?

    Thanks,

    Bruce
    8M x 4M X 2M no slope IG CONCRETE w/ceramic glass tile
    17,000 Gal EMAUX SWG JAZZI FILTER W/1-3 mm glass media, Jazzi Multi-port valve with
    T-750 filter w/ glass media
    1 main drain sump -3 returns - 1 skimmer
    Kokido digital salinity tester, Kokida drops for CL Hanna digital PH meter, Taylor K-2006

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    Texas Splash's Avatar
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    Re: I want to understand Pool Math

    I want to use Pool Math, but how do I know what to enter for the correct GOAL amount?
    Bruce, if you look below in my signature you'll see a link called "Recommended Levels". That's where you get your goals from.

    As for the CYA, as long as it is that low you will always struggle with FC loss and an increased potential for algae (and CCs). CYA is basically lost from water exchange. You definitely need to increase it right away. Since your CCs are elevated, I would recommend first taking the CYA to 30 and performing an overnight (OCLT) test to ensure you have no algae before taking the CYA to the recommended SWG level of 70. That way if you fail the OCLT and have to do a SLAM, you can do so at the lower CYA first and save some bleach.

    I would also recommend increasing TA to at least 50 with some baking soda.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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  3. Back To Top    #3
    Mod Squad pooldv's Avatar
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    Re: I want to understand Pool Math

    Chlorine level is set based on the CYA level in the pool and the Chlorine CYA Chart. I keep mine a little above target.

    Here is a page about Poolmath, Pool School - PoolMath
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Captain 776's Avatar
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    Re: I want to understand Pool Math

    Thanks for your replies.

    My pool in concrete structure with ceramic tiles for the face, so I used the Plaster numbers.......correct?

    April is the hottest month of the year in Thailand and this year it was record breaking heat and intense sun every day, it is a bit less now but still a strong sun during the day.
    Using the comparator and drops, shows my Chlorine level very bright yellow and way above the 3.0 mark? Any comment on that.
    That is all I have used so far is the comparator tube for Chlorine and PH.
    Is there a more accurate method for determining the Chlorine level? Is there a digital meter for it?
    I will check the internet now, but what method9s) do you guys prefer?


    Screenshot of the Pool Math.
    I will go to World Chemical tomorrow and try to get the CYA in line and then do a OCLT and where where that is.
    Based on the Pool Math results in the screenshot........I should;
    1. Add 6 96 oz Jugs of Bleach
    2. Add 120 oz Weight or 96 oz by Volume of Baking Soda
    3. Add 227 oz Weight or 181 oz by Volume of Calcium Chloride
    4. Add 91 oz Weight or 95 oz by Volume of stabiliser, I am going to try to find the 235 oz of liquid

    Can you review my pool math and plan forward........did I understand it correctly?
    8M x 4M X 2M no slope IG CONCRETE w/ceramic glass tile
    17,000 Gal EMAUX SWG JAZZI FILTER W/1-3 mm glass media, Jazzi Multi-port valve with
    T-750 filter w/ glass media
    1 main drain sump -3 returns - 1 skimmer
    Kokido digital salinity tester, Kokida drops for CL Hanna digital PH meter, Taylor K-2006

  5. Back To Top    #5
    Mod Squad pooldv's Avatar
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    Re: I want to understand Pool Math

    Yes, use plaster for your pool type. Pool School - Recommended Levels To measure chlorine we prefer the FAS/DPD test. Granular stabilizer/CYA is quite a bit cheaper than liquid. Did you change the parameters at the bottom to TFP, SWG and plaster? Salt needs to be entered in PPM.

    You will be Ok with CH at 350 and TA at 60.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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