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Thread: Next Step?

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    nthoms's Avatar
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    Next Step?

    I have a 22,500 gallon, vinyl lined, cartridge, salt water pool.

    The water looks good.

    FC: 5.0
    CC: 0.2
    TC: 5.2
    PH: 7.2
    TA: 70
    CH: 70
    CYA: 60
    SALT: 2600
    TEMP: 75

    Any advice on my next steps ... I am concerned about the PH being low (7.2).

    I have stamped concrete surrounding the entire pool ... should I also be concerned about the Calcium Hardness (70) being low?

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    Mod Squad woodyp's Avatar
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    Re: Next Step?

    Your calcium hardness is fine in a vinyl lined pool. That SWG will most likely tend to make your Ph rise due to turbulence in the cell. CYA might be a tad low.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Richard320's Avatar
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    Re: Next Step?

    The next step is to turn on the heater. 75 is too cold to swim in!

    Those readings are great! The SWG will probably drive the pH up a bit. There's no point raising pH today only to have to lower it again in three days. You don't need Calcium for the vinyl pool, and I wouldn't worry about the deck. Rainwater has no Calcium, and it hasn't dissolved it yet, has it?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: Next Step?

    How old is the system? is there a heater? I can see your question about the cement - it goes right to the edge? no coping?

    You can hold off on the PH for a few weeks and see if the PH drifts up on its own from the SWG, or maybe bump it to 7.4 with Borax.

    What is the recommended level for your salt system? 2600 seems a bit low.

    - - - Updated - - -

    Good points Richard!
    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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    nthoms's Avatar
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    Re: Next Step?

    Quote Originally Posted by woodyp View Post
    Your calcium hardness is fine in a vinyl lined pool. That SWG will most likely tend to make your Ph rise due to turbulence in the cell. CYA might be a tad low.
    Thanks

    - - - Updated - - -

    Thanks for the information

    Quote Originally Posted by Richard320 View Post
    The next step is to turn on the heater. 75 is too cold to swim in!
    I have an Electric HeatPump ... can I run an extension cord to your house ?

    Quote Originally Posted by Richard320 View Post
    Those readings are great! The SWG will probably drive the pH up a bit. There's no point raising pH today only to have to lower it again in three days. You don't need Calcium for the vinyl pool, and I wouldn't worry about the deck. Rainwater has no Calcium, and it hasn't dissolved it yet, has it?
    Nope ... the deck looks great! I just need to put on a coat of sealer as its been a few years. Any advice on cement sealers???
    22,500 gallon, vinyl lined, cartridge, salt water pool

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    nthoms's Avatar
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    Re: Next Step?

    Quote Originally Posted by frustratedpoolmom View Post
    How old is the system?
    --7 years old.

    Quote Originally Posted by frustratedpoolmom View Post
    Is there a heater?
    --Yes (HeatPump).

    Quote Originally Posted by frustratedpoolmom View Post
    I can see your question about the cement - it goes right to the edge? no coping?
    --There is coping around the edge.

    Quote Originally Posted by frustratedpoolmom View Post
    You can hold off on the PH for a few weeks and see if the PH drifts up on its own from the SWG, or maybe bump it to 7.4 with Borax.
    --OK. sounds like a good plan.

    Quote Originally Posted by frustratedpoolmom View Post
    What is the recommended level for your salt system? 2600 seems a bit low.
    --3400 is the recommended level ... I worry about so much salt around the cement so I tended to keep it low. Am I wrong with my assumption?
    22,500 gallon, vinyl lined, cartridge, salt water pool

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    Re: Next Step?

    Am I wrong with my assumption?
    Only if your SWG ois not genertating chlorine. If it's working, that's all that counts.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    nthoms's Avatar
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    Re: Next Step?

    The water still looks great.

    However ... my PH is dropping. It was 7.2, now it's barely reading 7.0

    FC: 5.0
    CC: 0.2
    TC: 5.2
    PH: 7.0
    TA: 70
    CH: 60
    CYA: 45
    SALT: 2900
    TEMP: 82
    SATURATION: -1.37

    Any advice on my next steps ... I am concerned about the PH being below (7.0). Should I be?
    22,500 gallon, vinyl lined, cartridge, salt water pool

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