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Thread: CYA not coming up

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    Join Date
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    CYA not coming up

    All my numbers are good except I cannot get my CYA up to 70-80.A month ago I tested it at 50 and added the required amount of stabilizer.A week later no change.I did it again and a week later no change.Even went to pool store and they get same numbers. My phospahates are 500, they tried to get me to buy stuff but said no. They got a little snotty after that. I have read about all of you with high phosphates and it not being a problem, so I stayed with that advice.Any idea what would keep my CYA down? I will say my pool is small and us large dads cannon ball a lot of water out to get our kids screaming "Bering Sea! Bearing Sea!" lol
    10,500 gal Gunite,Imperial White River Rok,1.5hp Pentair Whisperflo,320sqft Clean & Clear,Intellichlor 40 SWG,EasyTouch w/Remote,Pentair Pool Shark Sweep(suction side),Jandy AE2000 Heat Pump & 8mil Solar Blanket,SAM Light,18in Caribean Shelf,6 & 4 ft Benches

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    dmanb2b's Avatar
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    Re: CYA not coming up

    I don;t know where you are located, but I have had about 6-10 inches of water replaced to to the persistent rains over the past month...could be part of it
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    JasonLion's Avatar
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    Re: CYA not coming up

    How are you measuring the CYA level? Test strips can give wildly incorrect results. You should also check to make sure that what you are adding is 90+% cyanuric acid.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: CYA not coming up

    I have the K-2006 kit as recommended here.Pool store ironically got the same numbers as me.
    99% cyanuric acid was addded? Could my splashout be that bad? We cannon that sucker 5 out of 7 days a week.It is only 15 dia x 6 dp in the deep end.
    10,500 gal Gunite,Imperial White River Rok,1.5hp Pentair Whisperflo,320sqft Clean & Clear,Intellichlor 40 SWG,EasyTouch w/Remote,Pentair Pool Shark Sweep(suction side),Jandy AE2000 Heat Pump & 8mil Solar Blanket,SAM Light,18in Caribean Shelf,6 & 4 ft Benches

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    Marillion Fan's Avatar
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    Re: CYA not coming up

    How often are you adding water?
    18x33 15700 Gal Oval Above Ground
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    JasonLion's Avatar
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    Re: CYA not coming up

    Having enough water splashed out to lower CYA from 70 down to 50 in a week would be very very obvious. The water level in the pool would go down by about a foot. Something else must be happening.

    I can think of two other possibilities. If you have an auto fill system and a leak, it is possible to have that much water replacement in a week. If that was happening you would notice changes in your other levels as well. Another possibility, if you added CYA to the skimmer and then backwashed/cleaned the filter the same day you could lose nearly all of the CYA.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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