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Thread: Having difficulty in raising my CYA

  1. Back To Top    #1

    Join Date
    Jun 2011
    Location
    Austin, Texas
    Posts
    206

    Having difficulty in raising my CYA

    For weeks now, my CYA has measured less than 60 (using the R-0013 CYA Reagent bottle to test this). Since I have a salt pool, I'd like it up around 80 I think. I keep adding 3" chlorine tablets because somebody from this site told me that each tablet should raise my level about 4.3 ppm in my 7600 gallon above ground pool. I feel like over the last several weeks I've added 4 or 5 of those tablets, and I'm not seeing any CYA change.

    However, could one of these three things be the problem?:

    1) We've had a lot of rain, and several times I've backwashed to get the water level back down to the top of the skimmer opening, as the skimmer won't operate correctly when the water is past the skimmer hole.

    2) My R-0013 bottle is a year old. Does those things go bad after a year?

    3) My chlorine tablets are a little more than a year old. Do those lose their CYA after sitting in the bucket that long?


    Well, I did just use up the last of of my R-0013, and I'm about to order another one, so if (2) above is the problem, I'll hopefully get a good reading soon. If you experts here think that (2) is something to worry about, then I better put a halt to adding those chlorine tablets, for fear of overdosing my pool with CYA.
    18 foot diameter, 52" tall above ground Cornelius pool, with vinyl liner, and resin wall caps.
    Roughly 7600 gallons
    Blue Wave "Sandman" Sand filter/pump, model NE6150. Pump is 1 HP
    Intex SWG, model # 54601E

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: Having difficulty in raising my CYA

    The rain and backwashing will reduce the CYA.

    How was the reagent stored. if you kept it in the house at a fairly constant temperature with not spikes freezing or high heat I would think it would be fine.

    The CYA is still in those tablets. It will be there for the next millennium.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  3. Back To Top    #3

    Join Date
    Jun 2011
    Location
    Austin, Texas
    Posts
    206

    Re: Having difficulty in raising my CYA

    Yes, I've kept the reagent in my house the whole time. The hottest I ever let my house get (like when I'm not home) is 85 degrees, but 95% of the time it's much cooler than that.

    So if it's good that means the rain and backwashing must have gotten rid of a hefty amount if each tablet really contributes that much CYA. I guess I should keep adding tablets then. I guess if I ever deplete the bucket and ever need more CYA there are other sources I can go to, but I figure I may as well use what I have on hand first.

    I will say that a few weeks ago, I did get a measurement done at Leslie's Pool Supply, and they were in line with my own measurements.
    18 foot diameter, 52" tall above ground Cornelius pool, with vinyl liner, and resin wall caps.
    Roughly 7600 gallons
    Blue Wave "Sandman" Sand filter/pump, model NE6150. Pump is 1 HP
    Intex SWG, model # 54601E

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