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Thread: Cyanuric acid test with k-2000

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    Cyanuric acid test with k-2000

    Just started testing withthis K-2006 kit after 12 yrs of only testing ph and chlorine while using a frog system with tab inserts and also adding power powder plus (cal hypo) every 2 or 3 days

    Cya test - did not turn cloudy - does that mean 0? Should I try to raise?

    TA=40
    FC=6
    CC=20

    Any advice on how to handle?
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    JasonLion's Avatar
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    Re: Cyanuric acid test with k-2000

    Yes, you should add some CYA, but only up to around 30 for now. Then when everything is back to normal you can adjust it to it's normal level.

    Your TA is too low, and when TA is low it is likely that PH is also low. Both should be adjusted into their normal range.

    Between your description and your levels it seems like that your CYA gotten broken down over the winter and left behind some ammonia, which is what is causing the high CC level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Cyanuric acid test with k-2000

    So I can add some pool store stabilizer to raise the cya and at the same time add baking soda to raise the TA?
    Wondering about the timing or sequence
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    Re: Cyanuric acid test with k-2000

    Add the baking soda first and then add the CYA. Baking soda dissolves quickly. CYA takes hours to dissolve.

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    Re: Cyanuric acid test with k-2000

    For my CH = 180 instead of adding calcium chloride should I just use cal hypo instead of bleach for a bit and it should go up past 200 in a couple weeks ?
    Also any way to raise cya levels other than buying pool stores?
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    Re: Cyanuric acid test with k-2000

    new test results and a question
    FC .8 ppm - I know its low so will add a bit today
    CC .2 ppm - same as 1 week ago
    TA 80 ppm - last week 40 ppm - i added 7 lbs baking soda few days back
    CA 190 ppm - last week 180 pmm
    PH 7.6
    CYA - cloudy but still can see when tube is full - what does that mean?
    I added 3/4 can of Cyanuric acid from Leslies
    also using left over trichlor tabs in a floater and leftover Cal-Hypo powder, have added some liquid bleach also.

    any thoughts on the CYA level and how to handle?
    should I shock to see if that eliminates the CC?
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    JasonLion's Avatar
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    Re: Cyanuric acid test with k-2000

    Your CYA test result means CYA is around 10 (give or take).

    You can ignore CC when it only takes one drop of titrant to clear the CC.

    Your FC level is a little too low. You don't want FC falling below 1, even with CYA that low.

    You certainly need more CYA. For 26K gallons that means around 12 to 15 lbs more (though whatever you just added counts towards that).

    I assume CA is really CH. For a plaster pool you want CH at 250 to 350.

    By the by there is no point in doing the FC/CC test by 0.2s. Doing the test by 0.5s is plenty of precision and saves on reagents.
    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: Cyanuric acid test with k-2000

    thanks for the quick response....yes CA meant CH.....
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    Re: Cyanuric acid test with k-2000

    new test results
    FC 2.6 ppm - been adding bleach 1.42 gallons every 2 or 3 days
    CC .0 ppm - down from .2 1 week ago
    TA 80 ppm - last week 80 ppm - i added 3 more lbs baking soda few days back
    CH 180 ppm - last week 190 pmm
    PH 7.6 maybe towards 7.7
    CYA - 25 to 30 - added 3 more lbs of stabilizer earlier this week

    looks pretty good to me.....any concerns with the TA or CH levels? and should I continue to raise the CYA to about 50?
    I am also using trichlor tabs in a floater - prefer to keep a steady flow of chlorine going.
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    JasonLion's Avatar
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    Re: Cyanuric acid test with k-2000

    Looking much better

    CH is still low, it should be at least 250 for a plaster pool.

    TA is fine, 50 to 70 is the recommended range.
    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: Cyanuric acid test with k-2000

    new test results 6/9
    FC 2.2 ppm - been adding bleach 1.42 gallons every 3 or 4 days plus have trichlor tabs in a floater
    CC .0 ppm - 2 weeks in a row
    TA 90 ppm - last week 80 ppm -
    CH 180 ppm - last week 180 pmm
    PH 7.8 last week 7.7
    CYA - 40 last week 30 -

    si = -.1 based on 78 degree water.

    Questions
    should I add Muriatic Acid to lower the PH a bit or leave things alone?
    should I add anything to increase the CH or is it ok?
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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    Mod Squad Bama Rambler's Avatar
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    Re: Cyanuric acid test with k-2000

    The pH is fine, just keep an eye on it.

    Go ahead and bring the CH up to about 250 ppm.
    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
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    Re: Cyanuric acid test with k-2000

    very happy with pool water quality and using the Taylor k2000 to test it myself has really worked well. Lets me know whats going on without having to get misinformation from the various pool stores.

    latest test results 6/23 (I do a complete test weekly, test chlorine almost every day)

    FC = 1.6 - will bring this up a bit later today/tonite
    CC = 0
    PH = 7.6
    TA = 90
    CH = 220 - up from 170 after adding calcium chloride - will add a bit more
    CYA - 45
    24K gal, plaster, concrete decking, cantelivered coping, 20 years old, raised attached stone spa - 1 1/2 HP purex triton pump, 3 yr old 48 sq ft Pentair DE filter with multiport, Polaris 380 w/pump, 2 yr old Pentair mastertemp 400k heater - live in southeastern PA outside phila.

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