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Thread: Question about pool calculator

  1. Back To Top    #1

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    Question about pool calculator

    I have a question. I have found that using the part at the bottom of the pool calculator effects of pool calculator is a lot better for me. When I fill in the top and say I want to change pH level from 7.8 to 7.4 and I feel out all other test with the same number in now and target, I will get a different amount in the top part vs bottom part in the effects section.

    In the top part I will only want to affect pH and drop it to 7.4 from 7.8, 37 oz to be exact. In the top part though it will say add like 70 oz of acid, which in the bottom part says it will drop about .76.

    Am I doing something wrong here.

    Is there anyone else who uses just the bottom part when you need to change individual stuff like pH levels or chlorine?

    Thanks.
    13,000 Plaster IG Pool approx
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    frustratedpoolmom's Avatar
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    Re: Question about pool calculator

    The "effects" section doesn't take into account your current TA level so the amounts will be different.
    Use the top section to determine that dosage properly.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
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  3. Back To Top    #3

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    Re: Question about pool calculator

    Quote Originally Posted by frustratedpoolmom
    The "effects" section doesn't take into account your current TA level so the amounts will be different.
    Use the top section to determine that dosage properly.
    In the top section though, if I put TA the same in both columns, then that should not affect the acid addition right?
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

  4. Back To Top    #4
    frustratedpoolmom's Avatar
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    Re: Question about pool calculator

    Right, if you aren't adjusting TA, just put the same number in both.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  5. Back To Top    #5

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    Re: Question about pool calculator

    The amount of acid in the top section will vary depending on the TA level in the top section (even when the TA is the same in both columns; it mostly uses the Now column) AND on the starting and ending pH. The bottom section on the effect of adding chemicals does not take into account a different TA level nor a different starting and ending pH. The top section is the more accurate one.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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