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Thread: TA levels and FC Issues Possible

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    TA levels and FC Issues Possible

    Hello All,

    Looking on here I see the recommended level of TA is between 90-120.

    Here are my test results

    pH-7.5
    FC-2.5
    CC-.5
    TA-60
    CH-225
    CYA-35

    My pH level has been sitting at 7.5 for about 3 weeks. I am guessing the levels here are just recommended but not the right as each pool is different. So even though my TA level seems a little low but my pH level is holding then I should not worry?

    I am going by the phrase if it is not broke don't fix it, but wanted to get other opinions here. I have not added water in this time either with the exception of rain water and the pool is out in the open so no debris gets in.

    My other issues and I think I just need to bump up my CYA level. I would usually lose about 1-2 PPM daily even in the hot weather. Now I am starting to lose 2.5-3. Now my wife uses the pool pretty much all the time but that is only one person and really just floats around on floats no real swimming. Occasionally there are about 3 other people in the pool. No one used the pool yesterday and I lost 3.5.

    So I have two thoughts

    Do a OCLT test just to make sure there is no algae that is just unseen.
    Bump up the CYA to 50.

    Thanks in advance for your help.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
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    Richard320's Avatar
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    Re: TA levels and FC Issues Possible

    Sounds like a plan!
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: TA levels and FC Issues Possible

    Quote Originally Posted by mynewpool View Post
    Looking on here I see the recommended level of TA is between 90-120.
    Where do you see that? In Pool School, it says the recommended TA range is "60 to 120, sometimes higher". Your TA of 60 is perfect, and is helping maintain your rock-steady pH.
    25000-gallon semi-public IG concrete/plaster pool, Triton II sand filter
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    Re: TA levels and FC Issues Possible

    I think your plan makes good sense but am I missing how you are chlorinating the pool? I can't find it in your post or sig.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: TA levels and FC Issues Possible

    While CYA is 35, keep FC between 3 and 7 and never below 3.
    You post shows FC 2.5/CC .5 .

    Good plan to raise CYA, and FC accordingly.

    The higher TA is recommended for pools using trichlor (because it is acidic & can cause pH/TA to crash).

    Recommended TA with Bleach TA 70 to 90, and with SWG 60 to 80.

    http://www.troublefreepool.com/conte...mmended-levels
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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  6. Back To Top    #6

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    Re: TA levels and FC Issues Possible

    I use bleach.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
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    Re: TA levels and FC Issues Possible

    1. TA is perhaps the least critical of the parameters for which we test. With a pool chlorinated with bleach, the guideline (it's not a hard,fast rule) is 70-90 so your pool isa close enough with 60 that I doubt I would do anything to it.

    2. AN OCLT is probably in order to check for organics but that is in NO WAY related to TA.

    3. Raising you CYA is likely a good idea as well but keep all three of these things separated......they are not related.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: TA levels and FC Issues Possible

    An Update,

    I have been doing a OCLT test for 3 days in a row now and I keep losing 1.5, which is .5 over the limit and no CC.

    I dropped my pH level down to 7.2 yesterday so hopefully tomorrow I will be pass the OCLT. It is just frustrating when all appears to be well but it is not. I assume the 1.0 FC loss overnight is a rule and there are no exceptions to that rule?

    Other test results are above with the exception of pH is around 7.2 and CH is around 300 now.

    Thanks in advance.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

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    Re: TA levels and FC Issues Possible

    Update

    Passed the OCLT test this morning. No loss of FC and CC was 0.

    Go ME
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
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    Re: TA levels and FC Issues Possible

    Good job !😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Butterfly's Avatar
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    Re: TA levels and FC Issues Possible

    Nice work! Got a pic for us?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  12. Back To Top    #12

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    Re: TA levels and FC Issues Possible

    I will get one put up. It never really got green or anything it was always crystal clear so that was the confusion.

    One question though. I went from 16.5 PPM of FC and 0 CC yesterday morning to 11.5 PPM of FC and 0 CC 24 hours later with no pool use. Does that sound normal because it was so high to start with? The only thing I added was 2 lbs of CYA to bring up my CYA level to around 50 and there was a slight rain but only enough to get the ground wet. I am just used to my FC usage even with swimmers to be between 1-2.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

  13. Back To Top    #13
    Richard320's Avatar
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    Re: TA levels and FC Issues Possible

    Quote Originally Posted by mynewpool View Post
    I will get one put up. It never really got green or anything it was always crystal clear so that was the confusion.

    One question though. I went from 16.5 PPM of FC and 0 CC yesterday morning to 11.5 PPM of FC and 0 CC 24 hours later with no pool use. Does that sound normal because it was so high to start with? The only thing I added was 2 lbs of CYA to bring up my CYA level to around 50 and there was a slight rain but only enough to get the ground wet. I am just used to my FC usage even with swimmers to be between 1-2.
    That does sound okay.

    If CYA is 30, you'd maintain FC between 3 and 5 or thereabouts. From 5 to 3 is 40% loss. From 16.5 to 11.5 is 30% loss.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: TA levels and FC Issues Possible

    Update:

    Went from 11.5 FC and 0 CC to 24 hour Later 9.5 FC and 0 CC which is around 17.5%. I am used to around a 25%-33% loss so things are lookin good. It is amazing how things can be growing but unable to see them.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

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