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Thread: CYA question and more

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    Join Date
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    CYA question and more

    Hello,

    I am a newbie and have been SLAMing my pool for 9 days. It has gone from nasty green to cloudy blue, but has been stuck at cloudy blue for 3 days. We have cleaned the sand filter and added DE. I am still losing 3ppm consistently over night, so I know I am not done. We have dismantled the ladder steps and thoroughly scrubbed and cleaned them as well as taken the light out.

    As of this morning: FC 13.5, CC 0.5, pH 7.2 TA 130, CYA 35/40
    I added 2 bottles of chlorine (96oz 10%) to raise FC to 16/17

    How often I should check CYA? Does it change a lot? Because then I would need to be more vigilant on my FC count.

    Also, I bought the Taylor 2006 kit and I will need to purchase another bottle of Titrating Reagent R-0871-A. Any recommendations on where to get it, and should I go with a large bottle? Does it keep from year to year?

    Thank you for any help on the above questions, as well as advice on how to get it sparkly and ready for Labor Day!!
    Amanda

    30,000 gl; IG Vinyl; Hayward s210s sand filter; 1HP pump;Zodiak exp. Nature2; Oct 2006;

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    Re: CYA question and more

    Quote Originally Posted by afrikaanmomma
    Hello,

    I am a newbie and have been SLAMing my pool for 9 days. It has gone from nasty green to cloudy blue, but has been stuck at cloudy blue for 3 days. We have cleaned the sand filter and added DE. I am still losing 3ppm consistently over night, so I know I am not done. We have dismantled the ladder steps and thoroughly scrubbed and cleaned them as well as taken the light out.

    As of this morning: FC 13.5, CC 0.5, pH 7.2 TA 130, CYA 35/40
    I added 2 bottles of chlorine (96oz 10%) to raise FC to 16/17

    How often I should check CYA? Does it change a lot? Because then I would need to be more vigilant on my FC count.

    Also, I bought the Taylor 2006 kit and I will need to purchase another bottle of Titrating Reagent R-0871-A. Any recommendations on where to get it, and should I go with a large bottle? Does it keep from year to year?

    Thank you for any help on the above questions, as well as advice on how to get it sparkly and ready for Labor Day!!
    CYA doesn't change much unless you add some more or exchange water. TFTestkits.net is a good place to purchase supplies. It does last if you store it inside out of the sun.

    Your FC seems a little low. You might check your CYA again.
    16,500 gallon, 18" x 38" Grecian; IG Vinyl, Hayward DE

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    BoDarville's Avatar
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    Re: CYA question and more

    CYA is relatively stable, so there is no need to check it daily or even weekly. I check mine monthly and even that might be too frequently for me. Looking at your CYA results (35/40), I would go with 40 which means you need to bump your FC up to 16 ppm.

    Quote Originally Posted by afrikaanmomma
    Also, I bought the Taylor 2006 kit and I will need to purchase another bottle of Titrating Reagent R-0871-A. Any recommendations on where to get it, and should I go with a large bottle? Does it keep from year to year?
    You can buy this here: TFTest Kits Refills (scroll to bottom of page). These are Taylor reagents and are compatible with the K-2006 as well as TF-100. The 2 oz refill is the better buy. It will keep for well over a year if it is stored in a dark, cool, dry place.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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    Re: CYA question and more

    Thank you so much for the fast replies....
    Amanda

    30,000 gl; IG Vinyl; Hayward s210s sand filter; 1HP pump;Zodiak exp. Nature2; Oct 2006;

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    Re: CYA question and more

    I just reread my post and I wanted to clarify something. I suggested checking your CYA again because it can be a difficult test to master. Your level won't change much but it does determine your shock value. If your CYA is actually higher, you need to hold a higher FC level. Low levels of FC drag the process out.
    16,500 gallon, 18" x 38" Grecian; IG Vinyl, Hayward DE

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    Re: CYA question and more

    I am such a perfectionist that this CYA test is killing me. I guess it is 40, but I swear I can still see the ever-most slight greyish dot at the bottom. At 35 the dot is completely gone from my eagle eye!!
    Which should I choose? 35 or 40?

    I am guessing it is best say 40 to be on the safe side to bring FC high enough, right? i dosed the pool with another bottle of chlorine and the readings are now: FC 20, CC 0.5, CYA 40, TA 130, pH 7.4. I am using some well water to fill the pool from the backwash loss.
    Amanda

    30,000 gl; IG Vinyl; Hayward s210s sand filter; 1HP pump;Zodiak exp. Nature2; Oct 2006;

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    Re: CYA question and more

    Quote Originally Posted by afrikaanmomma
    I am such a perfectionist that this CYA test is killing me. I guess it is 40, but I swear I can still see the ever-most slight greyish dot at the bottom. At 35 the dot is completely gone from my eagle eye!!
    Which should I choose? 35 or 40?

    I am guessing it is best say 40 to be on the safe side to bring FC high enough, right? i dosed the pool with another bottle of chlorine and the readings are now: FC 20, CC 0.5, CYA 40, TA 130, pH 7.4. I am using some well water to fill the pool from the backwash loss.
    Use 40 and you are close enough. The accuracy on the test itself can throw you off 5 points. I just wanted to make sure you were not way off. I know the first time I tried it I wasn't even close.
    16,500 gallon, 18" x 38" Grecian; IG Vinyl, Hayward DE

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    Mod Squad jblizzle's Avatar
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    Re: CYA question and more

    Actually the test is at best only good to +/- 10ppm ... so just use 40ppm.
    Jason, TFP Moderator
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