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Thread: Balancing Next Step Help

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    Join Date
    Jul 2009
    Location
    Scottsdale, AZ
    Posts
    6

    Balancing Next Step Help

    My first post so thanks in advance for any help here. This is my second year of being a pool owner, but nothing unusual happened during year 1 so i still consider myself a newie. As signature states below, 16,000 gal. Salt Pebble-Tec Pool. We have the auto pilot system with an SC-48 cell. Replaced the cell about 16 months ago due to low amps-cell warning and using Auto pilot tech support.

    Recently readings from leslies shows the pool won't hold any FC levels. Had a service company come out and check the cell and ended up replacing the cell cord, it was hot and burn marks inside. Everything was good for about 3-4 weeks. Now back into check cell-low amps alarms. Green Algae all over the pool. Service company has now determined that the head unit needs to be replaced as the amps are 0.2A and the cell cord is hard again and showing signs of burning. I'm on a path to replace the head unit, but may take a few weeks.
    I have added 'green away' about a week ago and some shock. Green is gone but milky, hazy water is still in place.

    I have the TF-100 test kit on order, but here are my readings from leslie's today.
    FC: 0
    TC: 0
    PH: 8.0
    TA: 120
    CYA: 120
    Phosphates: 50
    Salt: 2900

    Questions: with the CYA being so high, should I try to shock or do I need to drain to get the CYA numbers down to 70-80 first? Per the pool calculator it is suggested to add 199oz of bleach and 19oz of acid to get the PH levels down, and replace 33% of the water. What is the proper order to follow? I'm guessing replace water first but want some advice.
    thanks
    16,000 Gallon; Auto Pilot Digital Control SC-48 SWG, IG Pebble-Tec, DE Filter

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    Re: Balancing Next Step Help

    ld,

    Welcome to the forum.

    First priority is to reduce your pH by adding muriatic acid. Take your pH down to the mid 7's and do not let it get back above 7.8

    Next I would drain/refill to get CYA in order. But first, wait for the test kit and perform your own CYA test. A salt water pool should not have gotten that high with CYA so I think it's worth confirming that 120ppm before you start draining.

    Then, you'll shock the pool but I see no reason to shock until you confirm exactly what your CYA level is.

    Where do you live? The test kit arrives in 1-5 days depending on how close to Raleigh, NC you are. I think you should wait.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Jul 2009
    Location
    Scottsdale, AZ
    Posts
    6

    Re: Balancing Next Step Help

    Dave,
    thanks for the feedback. I'm in Scottsdale, AZ and recieved the email notification that the kit shipped so I'm probably 4-5 days out. I'll do the acid step next and can always do the water test at leslies again to check on the PH level. The CYA level did seem very high but I don't have a high confidence level that it's right.
    16,000 Gallon; Auto Pilot Digital Control SC-48 SWG, IG Pebble-Tec, DE Filter

  4. Back To Top    #4

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    Re: Balancing Next Step Help

    The CYA level did seem very high but I don't have a high confidence level that it's right.
    Nor do I. Get your pH down and sit tight. Post your own test number and we'll get you started.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5
    Butterfly's Avatar
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    May 2007
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    South Carolina
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    Re: Balancing Next Step Help

    Hi ld and welcome to the forum

    Did leslies test your CH?
    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. ~

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