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Thread: Recommended numbers for my pool

  1. Back To Top    #1

    Join Date
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    Recommended numbers for my pool

    I read through pool school and was wondering if those numbers would be sufficient for my pool.

    I'm targeting......

    FC 3
    PH 7.6
    TA 90
    CH 300
    CYA 70
    Borates 50

    Those numbers give me a CSI of -0.26

    Pool specifics are in my signature and also run a water fall when pump is running. I'm noticing a significant PH rise though with the fall on when the pump runs so I may turn the fall off more often to help stabilize the PH.

    Any recommendations on numbers are welcome.
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

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    Re: Recommended numbers for my pool

    The Chlorine/CYA chart in Pool School gives a minimum FC 5 for CYA 70.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  3. Back To Top    #3

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    Re: Recommended numbers for my pool

    Would a higher TA help stop the upward drift of PH with the SWG and waterfall?
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

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    Re: Recommended numbers for my pool

    No, you need a lower TA to reduce the rate of pH rising.

    You said CSI was -.26, which made me nervous about suggesting you reduce TA any further. But I double-checked your numbers in the Pool Calculator; to make everything work out it looks like your water temp must be about 60F. CSI will go up as the temp goes up, so lowering your TA is probably okay.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  5. Back To Top    #5

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    Re: Recommended numbers for my pool

    My water temp is about 81F.
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

  6. Back To Top    #6

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    Re: Recommended numbers for my pool

    Keeping the PH at 7.8 and TA at 90 would give me a CSI of -0.1 or even allow me to lower the TA more with the water feature running.

    Is 7.8 too high though or should I keep it at 7.6?
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

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    Butterfly's Avatar
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    Re: Recommended numbers for my pool

    Hi Kenny,

    Have you seen the Water Balance Tips for SWGs in Pool School?

    Also, Waterbear has a tip page here that may help answer your q's:
    water-balance-tips-for-a-swg-t3663.html
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    JasonLion's Avatar
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    Re: Recommended numbers for my pool

    Quote Originally Posted by PaulR
    The Chlorine/CYA chart in Pool School gives a minimum FC 5 for CYA 70
    This is a SWG pool, so the minimum FC is 3 for CYA of 70.

    You actually want the CSI to be a little negative, -0.3 or a little lower in many case. The CSI inside the SWG cell is much higher than it is in the pool in general, and the same is true inside the heater (if you have one).

    I would aim for a TA closer to 70.
    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: Recommended numbers for my pool

    Thank you! Is CH ok at 300 then with the lower TA?
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

  10. Back To Top    #10
    Butterfly's Avatar
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    Re: Recommended numbers for my pool

    Quote Originally Posted by kenny
    Thank you! Is CH ok at 300 then with the lower TA?
    Recommended CH level is between 250 - 350, so I'd say you're perfect.

    You can read all the Recommended Levels in Pool School.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  11. Back To Top    #11

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    Re: Recommended numbers for my pool

    Quote Originally Posted by JasonLion
    This is a SWG pool, so the minimum FC is 3 for CYA of 70.
    Ah, missed that--kenny didn't give a salt level and it didn't click that Intellichlor is a SWG. Oopsie!
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  12. Back To Top    #12
    Butterfly's Avatar
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    Re: Recommended numbers for my pool

    Kenny, it would be good if you added SWG along with Intellichlor IC40 in your sig.

    Those of us that do lots of reading could use all the help we can get!
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  13. Back To Top    #13

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    Re: Recommended numbers for my pool

    Done.........and again thanks for all the responses.
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

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