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Thread: CYA and TA and Ph

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    CYA and TA and Ph

    hi
    here are my number as of this morning.
    FC 3.5
    CC 0
    TC 3.5
    TA 80
    PH 7.6
    CYA 20
    My CYA is i bit low,and my TA is a little low. I am having to use allot of MA to keep it in check. also i think I am using a allot of Bleach About 3 quarts a day.. I have done the over night test and I am not losing any at all... So i know that i don't have any algae eating it up... MY question is with my CYA being a bit low would this be why I am having problems with the Ph raising and the TA being a bit low to... And also why I am using allot of bleach.
    Can i start using Pucks again for awhile to raise the CYA or will this take to long?
    My pool is crystal clear and does not smell of any bleach what so ever.. It looks great but just seems to have to have to adjust ever thing all the time
    was just wondering... All is well though
    thanks for all the help
    jim
    live in eastern washington state
    18x36, Vinyl inground 24k
    Hayward 1 hp filter pump
    1 skimmer/2 returns
    24" sand filter, polaris 280 with booster pump.

  2. Back To Top    #2

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    Re: CYA and TA and Ph

    MA lowers pH and TA; your TA is not low at all. You can keep after it with MA has you've been doing, or you can be more purposeful about lowering TA quickly. That's mostly a convenience choice.

    The low CYA is why you lose FC in the daytime and need lots of bleach to keep up. The usual recommendation is CYA 30-50; in eastern WA the sun is not that high but it's out for a long time every day (I used to live in Everett). I'd say bring CYA up to 40 and see how things are.

    You can use pucks for that but it will take quite a while. In 25K gallons, you'd need to use up 15 pucks to raise CYA by 20. Figure it takes a week or so to dissolve a puck, and you probably don't want to do more than 3-4 at once. It will help keep your pH down, though!
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  3. Back To Top    #3
    Guest

    Re: CYA and TA and Ph

    If you need to use a lot of acid to keep the pH in line then your TA is too high, not too low.

  4. Back To Top    #4

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    Re: CYA and TA and Ph

    I don't think my TA is high, I have done the test very carefully and i get the same reading all the time... It takes 8 to nine drops to change color from green to in my case it turns almost a black color...I have to go to the pool store today to get some parts for my Polaris 280 so i think I am going to take some water and have it tested to see if its close to what i have...we will see
    I am going to raise my CYA a little and see if that makes a difference.
    thanks
    Jim
    live in eastern washington state
    18x36, Vinyl inground 24k
    Hayward 1 hp filter pump
    1 skimmer/2 returns
    24" sand filter, polaris 280 with booster pump.

  5. Back To Top    #5

    Re: CYA and TA and Ph

    try adding another drop or two on the TA test. my test always turns dark BEFORE it turns red. I think you are stopping too soon and your TA may be at least 10 points higher (or more). Won't hurt to try.
    10,000 IG vinyl liner pool, Hayward sand filter, Hayward SuperPump (converted to 2-speed), BBB user

  6. Back To Top    #6

    Re: CYA and TA and Ph

    Also. TA is not too high at 80. Some folks like it as high as 110-120.
    10,000 IG vinyl liner pool, Hayward sand filter, Hayward SuperPump (converted to 2-speed), BBB user

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    Re: CYA and TA and Ph

    Can i start using Pucks again for awhile to raise the CYA or will this take to long?
    That'll take too long and possibly contribute to some other issues. Simply go to HD/Lowes/Pool Store, etc. and get a container of stabilizer (CYA, CYanuric Acid) and bring your level up to 40ppm. You will have a significant decrease in your FC consumption.

    The TA and pH numbers you post are fine. If it were my pool I would ignore them other than to check them regularly.

    If your pH continues to rise, simply lower it with some muriatic acid. It is unrelated to your low CYA.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: CYA and TA and Ph

    Quote Originally Posted by drband
    try adding another drop or two on the TA test. my test always turns dark BEFORE it turns red. I think you are stopping too soon and your TA may be at least 10 points higher (or more). Won't hurt to try.
    Hear, hear. It goes through a dark gray stage before turning red. You keep adding drops until it stops changing color; but if it started green and went dark, you're not done yet.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  9. Back To Top    #9

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    Re: CYA and TA and Ph

    I am going to try to add more drops,, I thought that Jason said once that i was to look for a color change Any color change.. Did not have to go to pink just a color change. So that's what i have been doing.
    but yes i am going to Add some CYA and see if that helps on the FC usage.
    thanks
    Jim
    live in eastern washington state
    18x36, Vinyl inground 24k
    Hayward 1 hp filter pump
    1 skimmer/2 returns
    24" sand filter, polaris 280 with booster pump.

  10. Back To Top    #10
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    Re: CYA and TA and Ph

    Quote Originally Posted by hayfarmer
    I am going to try to add more drops,, I thought that Jason said once that i was to look for a color change Any color change.. Did not have to go to pink just a color change. So that's what i have been doing.
    but yes i am going to Add some CYA and see if that helps on the FC usage.
    thanks
    Jim
    Perhaps this will help explain
    Read #2 in particular
    http://www.taylortechnologies.com/Chemi ... ntentID=35

  11. Back To Top    #11
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    Re: CYA and TA and Ph

    Quote Originally Posted by hayfarmer
    My CYA is i bit low,and my TA is a little low. I am having to use allot of MA to keep it in check.
    Quote Originally Posted by hayfarmer
    I don't think my TA is high, I have done the test very carefully and i get the same reading all the time... It takes 8 to nine drops to change color from green to in my case it turns almost a black color...I have to go to the pool store today to get some parts for my Polaris 280 so i think I am going to take some water and have it tested to see if its close to what i have...we will see
    I am going to raise my CYA a little and see if that makes a difference.
    thanks
    Jim
    If your pH is rising too fast then your TA is too high, period!

  12. Back To Top    #12
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    Re: CYA and TA and Ph

    Quote Originally Posted by drband
    Also. TA is not too high at 80. Some folks like it as high as 110-120.
    It really depends on what you are using for sanitizer. If you are using primarily trichlor, dichlor, chlorine gas, bromine, or a lot of MPS then a higher TA is better. If you are using liquid chlorine or bleach, cal hypo, lithium hypo, or a SWG then a lower TA is better.
    If you pH is rising too fast lower your TA
    If you pH and your TA keep dropping then raise the TA.

  13. Back To Top    #13
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    Re: CYA and TA and Ph

    that's correct..a ta of 60 is not considered too low, if that's what it takes to stabilize your PH...each pool is unique and does not have to follow the suggested levels to the letter...some experimentation can help
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  14. Back To Top    #14

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    Re: CYA and TA and Ph

    Quote Originally Posted by hayfarmer
    I thought that Jason said once that i was to look for a color change Any color change.. Did not have to go to pink just a color change. So that's what i have been doing.
    You need it to start changing, and then stop changing. The exact color can vary depending on things like FC level, but the process is the same. The last drop that causes a change is your drop count.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  15. Back To Top    #15
    frustratedpoolmom's Avatar
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    Re: CYA and TA and Ph

    When you say the PH is rising....

    Are you testing PH when the FC is above 10?

    Do you have a source of aeration that would cause the rise, like a fountain or waterfall, etc.?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  16. Back To Top    #16

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    Re: CYA and TA and Ph

    No mom I am not testing when FC is over 10. I do know that will alter the test results or not give a true reading.
    The PH raises every time i add bleach or should i say it creeps up over about a 5 day period.. I did do another TA test and the last drop that i add to change to pink is 10 so that's a 100 so i guess I am in the ball park on that.. But i am still going to the Pool store to get parts for my Polaris and I am going to have them check it.... I Know I know that they will TRY to sell me something,,, but I am pretty hard headed when i am doing something that works
    thanks guys and gals for all the info and help, I will be gone for the day going to pool store and COSTCO as we call it the $500.00 store... LOL
    i will check in with my results from the pool store
    see ya
    Jim
    live in eastern washington state
    18x36, Vinyl inground 24k
    Hayward 1 hp filter pump
    1 skimmer/2 returns
    24" sand filter, polaris 280 with booster pump.

  17. Back To Top    #17
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    Re: CYA and TA and Ph

    Quote Originally Posted by hayfarmer
    The PH raises every time i add bleach or should i say it creeps up over about a 5 day period
    Then lower your TA! It's really a very simple fix. If your pH is rising over a 5 day period it is from the outgassing of CO2 and the fix for that is to lower the TA to reduce the carbonation in the pool.
    ta-what-is-it-really-t4979.html
    how-to-lower-ta-t5341.html

  18. Back To Top    #18

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    Re: CYA and TA and Ph

    Hi again, Iam back from town.
    Here are the results from pool store.
    FC 2.5
    TC 4.2
    CC 1.7
    PH 7.9
    CYA 35

    here are mine from this morning
    FC 3.5
    CC 0
    TC 3.5
    TA 80
    PH 7.6
    CYA 20
    the results are not all that much different but they are saying that i have CC and i show none.
    so i guess i am going to try to lower my TA so i can try to stabilize the PH And I am going to raise the CYA to around 40.
    they tried to sell me 10 bags of burn out extreme. I told them i had some already.... LOL
    And they tried to sell me 13lbs of balance pack 100 to raise my TA. Again i told them i had some....
    I came home with money in my wallet
    thanks jim
    live in eastern washington state
    18x36, Vinyl inground 24k
    Hayward 1 hp filter pump
    1 skimmer/2 returns
    24" sand filter, polaris 280 with booster pump.

  19. Back To Top    #19
    frustratedpoolmom's Avatar
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    Re: CYA and TA and Ph

    You don't show their TA results....

    I'd trust your own tests over any pool store.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  20. Back To Top    #20

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    Re: CYA and TA and Ph

    sorry about that
    there TA is 91 for the Adjusted and 102 for the total...
    yes i will trust mine but just want to see how far off we were from each other....
    thanks
    jim
    live in eastern washington state
    18x36, Vinyl inground 24k
    Hayward 1 hp filter pump
    1 skimmer/2 returns
    24" sand filter, polaris 280 with booster pump.

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