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Thread: CYA Issues -- really want to swim!

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    Join Date
    May 2012
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    Kansas City, MO
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    CYA Issues -- really want to swim!

    So I frequently have issues with our CYA not reaching a good level. Using the TF-100, here's what we have:

    FC = 3.5
    (forgot to test CC)
    TA = 80
    CYA = between 20-30
    pH = 7.3 or 7.4 (hard to be 100% sure)

    Water is clear, but mildly cloudy. We also tend to get what I think is pollen at the bottom of our pool pretty regularly. Very aggravating, but it's been like this every year now. A neighbor of mine has the same issue so I assume it's pollen anyway.

    Did an overnight test, but realized I had some pucks floating that I hadn't removed. Honestly I don't think they're working anyway. Do they lose their effectiveness after a couple of years? I put about 3 or 4 in the floater last Sunday just to test (FC was at zero). Nothing had changed by Tuesday. And my CYA was still at 20. I've since added bleach as recommended for shock at 20 CYA.

    So, I'll continue with the bleach, but obviously need to work on raising the CYA. Can I put the granular cyanuric acid in the sock in the skimmer and still swim, or do we have to wait for that to dissipate and wait even longer? I thought I remembered reading somewhere about waiting a week. Is that correct? My kids haven't had a chance to swim in the pool at all this summer. We had a bad algae problem and a million tadpoles in there about a month ago. Luckily all of that is gone.

    Thanks for any advice anyone can give.
    28,800 gallons (33' x 4.5' round AG), Sand Filter

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    Mod Squad jblizzle's Avatar
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    Re: CYA Issues -- really want to swim!

    Cloudy water and FC not showing up ... Sounds like algae is in the water and you need to follow the SLAM process.

    You can swim while the CYA is dissolving. I would want to clear up the water before swimming personally.
    Jason, TFP Moderator
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    Butterfly's Avatar
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    May 2007
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    Re: CYA Issues -- really want to swim!

    Can I put the granular cyanuric acid in the sock in the skimmer and still swim
    Yep, you can swim with the sock of CYA in the pool.

    You do need to do the SLAM process, but if the water is clear enough so you can see someone on the bottom and the FC is below normal SLAM FC shock level, you can swim. But, doing so will prolong the SLAM process.

    Rinse before swimming and take showers after swims.
    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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  4. Back To Top    #4

    Join Date
    May 2012
    Location
    Kansas City, MO
    Posts
    26

    Re: CYA Issues -- really want to swim!

    Well, FC is currently at 3.5, but clearly I just need to keep hitting it hard for a few more days. Thanks for letting me know about the CYA. I couldn't recall if it was safe to swim while it was dissolving or not.
    28,800 gallons (33' x 4.5' round AG), Sand Filter

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