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Thread: Cyanuric Acid level too high and already drained pool

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    Cyanuric Acid level too high and already drained pool

    Help!

    I had a water test on 6/16 and my Cyanuric Acid was at 117
    (see below for levels)
    16X32 - 11k - sand filter - AG - Chlorine - 2007
    FC - 4.16
    CC - 0
    pH - 6.8
    TA - 19
    CH - 154
    CYA - 117
    I drained off 1 foot of water and refilled and then had a retest. (no other chemicals added)
    The CYA was now 135.
    I then drained the pool down to only 1 foot of water left, drained the filter, and back flushed it with fresh water.
    I refilled the pool, added no chemicals and had a retest.
    FC - 0.11
    CC -0
    TA - 67
    PH - 7.1
    CH - 114
    CYA - 133
    WHAT, I just replaced most of the water in the pool and it goes up?!? We retested and it was the same.
    I had them test the tap water and the CYA was 15. I had them test from a fresh container and it was still 130.
    Anyone have any ideas?
    I have seen on the web some stuff about a chemical to reduce it but???

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    Mod Squad JohnT's Avatar
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    Re: Cyanuric Acid level too high and already drained pool

    CYA testing is very subjective, and is inaccurate above 100ppm. How are you getting the results?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
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    Mod Squad Bama Rambler's Avatar
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    Re: Cyanuric Acid level too high and already drained pool

    Welcome to TFP.

    You've just been pool stored!

    You're seeing just how bad pool store tests can be.

    Most CYA tests are only accurate to 100 ppm and report anything after that as 100 or above. You really have no idea how high it really is until you get your own good test and perform your own tests.

    There is no chemical that we know of to reduce CYA. R/O treatments will do it but that's only available in a very few places. The only other way to get rid of it is to drain and replace water.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Cyanuric Acid level too high and already drained pool

    Quote Originally Posted by vv3629
    WHAT, I just replaced most of the water in the pool and it goes up?!? We retested and it was the same.
    I had them test the tap water and the CYA was 15. I had them test from a fresh container and it was still 130.
    Anyone have any ideas?
    It may be their testing. I don't think tap water ever has cya in it.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Re: Cyanuric Acid level too high and already drained pool

    the test was a pool store.
    I did drain the pool, while not all the way, it was 80% of the way so there should have been some dilution.

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    Re: Cyanuric Acid level too high and already drained pool

    Anyone have any ideas?
    Yes. Stay away from Pool Stores.....you need to get your own test kit and stop trusting the completely bogus information you have been given.

    Probably the biggest reason this forum exists is because you simply cannot trust pool stores.

    Nothing for you to do but to drain but I would do my own testing........you might be better off than you currently think.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Cyanuric Acid level too high and already drained pool

    OK, so if I stay away from pool stores, where is the best place to buy testing stuff and chemicals?

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    Re: Cyanuric Acid level too high and already drained pool

    where is the best place to buy testing stuff and chemicals?
    Well, I'd be a fool if I didn't take that bait....tftestkits.net

    Seriously, you need a really good kit (either the TF-100 or the Taylor K-2006) so you can manage your own pool. Chemistry can be picked up at the grocery store, HD, Lowe's, etc.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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