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Thread: Pool help

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    Pool help

    I'm a very frustrated pool owner the past two years. Mostly in part due to high cya due to overuse of tabs in the skimmer.
    I'm learning from your site. Just opened the green swamp and now its cloudy blue with floating algae at times. Just added 6 (182oz) bottles of bleach and 20lbs of baking soda and using my test kit T100.

    Vinyl pool
    approx 25,000
    FC 18
    CC 1
    PH 6.8
    Alk 180
    Calcium 60
    CYA 75-80
    What do I do next?? Thanks.

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    Re: Pool help

    Well, you got a little ahead of yourself. Why did you add the baking soda?

    You are gonna' have to shock your pool but I would rather have you raise your pH first. Is that what you were trying to do with baking soda?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad zea3's Avatar
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    Re: Pool help

    Hi, welcome to TFP! Were the test results posted before or after you added the bleach and baking soda? If so how long did you wait before testing? If you tested after giving everything about an hour to mix with the water then here's what you need: According to the pool calculator your shock level is 21. You need to raise the FC back up to 21 ppm with 1.6 jugs of 6% bleach (96 ounce size jug).
    Baking soda does not raise the pH very much. It has a greater effect on raising TA. Soda ash or washing soda has a greater effect on raising pH. You can also aerate the water to raise your pH by pointing the return upward so it breaks the surface of the water. That bubbling action will raise pH without raising your TA any higher.
    TFP Moderator
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    Re: Pool help

    I waited an hour before those numbers so did like you said and added 2 jugs of bleach. Brushed the whole pool and the algae that came up is suspended not sure if it's dead.

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    Re: Pool help

    so did like you said and added 2 jugs of bleach.
    Do you have another thread started on the forums?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool help

    No I don't

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    Re: Pool help

    What do I do next??
    1. I would like to see you drain some more of your pool to get your CYA down to around 40-50

    2. Retest pH and add Borax (if necessary) to get pH up to 7.2

    3. Shock the pool according to the article in Pool School.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool help

    I'll drain again today. Good news is there were no CC's this morning and chlorine was 16.5 after 21 yesterday. Thanks

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    Re: Pool help

    Drain/refill and reduce your CYA down to that 40-50 number (you should drain about 1/3 of your pool).

    Then, let's start over so we can tell exactly where you are. Post test results for FC CC pH TA and CYA.

    Plan to shock your pool with A LOT of bleach.

    Looking forward to your next post with test results.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool help

    Drained and drained now cYa is at 70
    Added Borax
    Levels are as follows:
    PH 7.2
    FC 6
    CC .5 or less
    Alk 220

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    Re: Pool help

    What does your water look like?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool help

    cloudy blue some algae on the bottom that brush up and suspends in the water, getting clearer slowly, can now see the bottom of the shallow end. think i overchlorinated. My FC is 27.5 and my tc is 28.5
    kids want to know when they will be swimming.

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    Re: Pool help

    Keep brushing that algae up. The sooner you get it off the bottom through vacuuming or brushing, the sooner your pool will clear.

    I would be reluctant to swim in a less than clear pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pool help

    what's the highest FC that's safe to swim in?

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    Re: Pool help

    It is safe to swim up to shock level for your CYA value. However, it is not safe to swim in water that is not clear -- you need to be able to see to know swimmers are safe.
    POOL: Intex ultra new in 2014 (32 x 16 x 52) (seasonal; on concrete pad covered with 1.5" extruded or whatever foam insulation sheets - ugly, but comfy); added a through-wall skimmer; I add salt for feel. EQUIPMENT: Pentair SuperFlo pump (1HP, 2SPD); Pentair cartridge filter (200 sq. ft); Pentair MasterTemp natural gas heater (400,000 btu) Climate/Location: Eastern Nebraska

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    Re: Pool help

    Ok this morning it's:
    FC 12.5
    CC 0
    PH 7.2
    Alk 200
    CYA 70-80 (still draining and refilling as much as we can)
    Can almost see the bottom of the deep end, still pretty cloudy, no visible algae
    What's next? THANKS.

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