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Thread: Recommended Levels?

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    dmcody's Avatar
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    Jun 2008
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    Pittsburgh, PA
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    Recommended Levels?

    Am I shortening the life of my vinyl liner with these levels?

    Test Kit - TF100
    FC 8
    pH 7.5
    TA 110
    CH 130
    CYA 70

    I just switched from PB to the DIY BBB method and I'm concerned about the FC, TA, and CYA levels for a vinyl pool. The Pool School recommends, FC 3-7, TA 70-90, & CYA 30-50.

    I'm slightly higher than recommended & I know that lowering the CYA will allow me to lower the target FC, but I'd like to try and let the CYA lower on its own and not drain & replace 12-14K gallons.
    Pool Type/Size: Inground Vinyl ~24,000 gal ~ 18' x 36'
    Filter Type: Pentair FNS Plus 36 - DE Filter
    Pump: Pentair Challenger - 1.5 hp
    Heater: Pentair Mastertemp 250K BTU
    Accessories: Hayward AquaRite SWG Controller

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    Mod Squad JohnT's Avatar
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    Apr 2007
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    SW Indiana
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    8,617

    Re: Recommended Levels?

    I believe you are fine on all counts. Your CYA is higher than optimum, but if you stay away from stabilized chlorine, it will drop some due to rainwater and splashout, and in a season or two you'll be fine.

    The CYA "buffers" the chlorine, so the effect on your liner is about the same as a much lower FC level with no CYA.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    frustratedpoolmom's Avatar
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    Re: Recommended Levels?

    Hi there,

    My TA is the same as yours, your other numers are okay and won't hurt your vinyl liner.

    As for the CYA, backwashing with your sand filter will also reduce it over time. Heck next year you might find yourself adding some! LOL

    Pool store chems and unbalanced water did more discoloration on my liner than at any point of using BBB.....
    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

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    dmcody's Avatar
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    Pittsburgh, PA
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    Re: Recommended Levels?

    Thanks!! - I'm amazed at how simple pool maintenance is compared to how the PB makes it seem.
    Pool Type/Size: Inground Vinyl ~24,000 gal ~ 18' x 36'
    Filter Type: Pentair FNS Plus 36 - DE Filter
    Pump: Pentair Challenger - 1.5 hp
    Heater: Pentair Mastertemp 250K BTU
    Accessories: Hayward AquaRite SWG Controller

  5. Back To Top    #5

    Join Date
    Jun 2008
    Location
    Tucson area, AZ
    Posts
    344

    Re: Recommended Levels?

    Quote Originally Posted by dmcody
    Thanks!! - I'm amazed at how simple pool maintenance is compared to how the PB makes it seem.
    Well, if everybody realized how simple pool maintenance is, a lot of PB's would be out of a job. Can't have that, can we?
    Above ground soft side Omega pool
    20 feet diameter, 4 feet deep
    Hayward sand filter
    Hayward 1 HP Matrix pump
    Hayward Aquabug Automatic Pool Cleaner

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    frustratedpoolmom's Avatar
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    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,963

    Re: Recommended Levels?

    Quote Originally Posted by Swimgirl
    Quote Originally Posted by dmcody
    Thanks!! - I'm amazed at how simple pool maintenance is compared to how the PB makes it seem.
    Well, if everybody realized how simple pool maintenance is, a lot of PB's would be out of a job. Can't have that, can we?
    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

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