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Thread: Unexpectedly bad opening

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    Join Date
    Jul 2011
    Location
    Schoolcraft MI
    Posts
    10

    Unexpectedly bad opening

    So, pulled the cover off today and ran through my tf100

    FC - 0
    CC - 0
    Ph - ~7.0 (a little higher)
    Alkalinity - 100
    Calcium - 110
    CYA - Below 30

    I have a mesh cover, so I'm sure that ran the calcium and CYA down pretty good.

    On closing I had

    FC - 10
    CC - 1
    PH - ~7.5
    Alkalinity - ~100
    Calcium - 350
    CYA - 60


    Pool calc has me putting in 2 jugs of 10% Bleach, 6lbs of Baking Soda, 40lbs of Calcium, ~7lbs of CYA to get me to 30


    I'm not so sure I need to add so much calcium as my water is REALLY hard to start with and it will jut keep going up over the summer as I fill it.

    Should I start with the CYA and the Bleach then go from there? I've got socks ready, just trying to find stabilizer locally.
    38x18 Oval 27000 Gal
    In Ground Vinyl Sides
    1HP Pump
    Sand Filter (unsure of flow rate)

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    duraleigh's Avatar
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    Re: Unexpectedly bad opening

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

  3. Back To Top    #3
    Mod Squad zea3's Avatar
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    Jul 2009
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    Re: Unexpectedly bad opening

    You have a vinyl pool, your calcium is fine at 110. Did you run the pump and hour before testing the water? You want to make sure everything is well mixed before the first test of the season. If you did then go ahead and add the CYA and bleach.
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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  4. Back To Top    #4

    Join Date
    Jul 2011
    Location
    Schoolcraft MI
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    Re: Unexpectedly bad opening

    OK, so I didn't really believe my numbers had changed so much. Ran the pump for another several hours and rechecked and I'm glad I did;

    FC - 0
    CC - 0
    PH - 8
    Alkalinity - 100
    Calcium - 280
    CYA - 35

    At this point, I'm going to add the Bleach and check it in the morning. I'll do Muratic Acid in the morning.

    Just running the pump though i can already see the bottom of my pool.
    38x18 Oval 27000 Gal
    In Ground Vinyl Sides
    1HP Pump
    Sand Filter (unsure of flow rate)

  5. Back To Top    #5
    Vette's Avatar
    Join Date
    Jul 2012
    Location
    Ohio
    Posts
    404

    Re: Unexpectedly bad opening

    Wait did you add Calcium? Because 110 to 280 without adding any is not in the margin of error. I'd test again to make sure you are getting the correct results. How old are the reagents?
    11,700 gallon 21' round 54" deep all-resin AGP - June 2012
    Waterway 1HP 2-speed pump / 100 sq ft cartridge filter
    Hayward 150,000btu Natural Gas heater
    I use and recommend the TF-100 for testing

  6. Back To Top    #6

    Join Date
    Jul 2011
    Location
    Schoolcraft MI
    Posts
    10

    Re: Unexpectedly bad opening

    Quote Originally Posted by Vette
    Wait did you add Calcium? Because 110 to 280 without adding any is not in the margin of error. I'd test again to make sure you are getting the correct results. How old are the reagents?
    I verified it, tested twice. Brand new kit from Amazon. I'm thinking I just tested to soon, or my first test was way off.
    38x18 Oval 27000 Gal
    In Ground Vinyl Sides
    1HP Pump
    Sand Filter (unsure of flow rate)

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