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Thread: Fill Water loaded with PH

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    Fill Water loaded with PH

    It's warmer now and I'm having to replace water that is evaporating. My PH is uncontrollable along with TA. I tested my fill water twice in the last two days and I'm sure this is the problem. See attached pic. I can understand why the PH in the pool would be going up, but not sure why TA would also be rising. Are the two !00 percent correlated? Thanks in advance.
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    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    Whats the TA of the fill water?
    -Brian-
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    Re: Fill Water loaded with PH

    Didn't think about TA in fill water. Not good on my end, will test and post.
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    tested and TA is 30
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    Thats really not possible. Something is wrong with your test
    -Brian-
    33K Pool/Spa, Pentair Equipment
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    Re: Fill Water loaded with PH

    I tested TA 3 times from the fill water, all 3 tests came up with 30. 3 drops of r-0009 and turns red. first two of r-0007, then five of r-0008.
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    Interesting
    Pool installed 8/2015. 30' round Radiant pool. 21,000 gallons. 200# sand. Hayward Vari flow XL valve. 1.5hp Hayward Power-Flo Matrix running 10 hours/day in two periods. TF100 with speed stir. Sun all day, south side of house
    Order test kit TF-100 w/ Speed Stir and then Poolmath Calculator --- RECOMMENDED LEVELS --- POOL SCHOOL --- Algae? --- Chlorine/CYA CHART.

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    Re: Fill Water loaded with PH

    I'm definitely not a chemist. It seems strange to you guys that the fill water can have a PH of ~ 15 along with a TA of 30. I've tested PH twice and TA three times
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    Quote Originally Posted by TJTJ View Post
    I tested TA 3 times from the fill water, all 3 tests came up with 30. 3 drops of r-0009 and turns red. first two of r-0007, then five of r-0008.
    What size sample are you using for the TA test?

    What are the current numbers from the pool?
    -Brian-
    33K Pool/Spa, Pentair Equipment
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    Davis Custom Construction - Home Page

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    Re: Fill Water loaded with PH

    All the tests are good

    PH 7.5
    CYA 30
    CH 310
    TA ~ 7.2
    FC 8
    CC 0

    PH and TA keep rising

    Maybe the issue for testing the fill water is that I'm using a small amount of water to test. 3 gallon bucket. I should purchase a 5 gallon bucket or larger?

    Thanks

    - - - Updated - - -


    I'm using 25 ml to test TA
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    TA ~ 7.2???

    TA is a buffer for pH. The higher the TA, the higher and faster the pH will climb. Low TAs (say around 40 and below) can cause the pH to crash (lower). If your TA is truly 30 then your pH would not likely be rising, it would be falling or at least holding steady. The pH would theoretically stop rising (if the source of the rise is from aeration) at around 8.02 due to it being at equilibrium with the carbon dioxide content of air and rise very slowly well before that point.

    Your original concern was with the pH and TA constantly rising. A TA of 30 does not indicate that the TA is rising at all unless you are intentionally adding baking soda (sodium bicarbonate) and then adding tons of acid to lower the pH.

    Can you be a little more specific about what the issue is and what you are hoping to achieve?

    What is meant by using a bucket?
    -Brian-
    33K Pool/Spa, Pentair Equipment
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    Re: Fill Water loaded with PH

    TA is 30 from the fill water. Approximately 14 ph or so from the fill water. I attached a picture of the PH reading of the fill water. I put water from the source (house) into a 3 gallon bucket. I understand why my PH is going up, water I add to pool is very high in PH. Is this what is also making the pool's TA rising? I'm not sure. Could it be something else? TA from the fill water is only 30, so why is my TA climbing too? I hope I am making sense. Thanks,
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    in response to your question TA ~ 7.2. TA from the pool is approximately 7.2. I realize that we multiply by 10 and we should obtain a even number.
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    A pH of 14 would be far from healthy. Drain cleaner has a pH of 14, I doubt thats whats coming out of your faucet. How are you measuring this?

    "TA from the pool is approximately 7.2. I realize that we multiply by 10 and we should obtain a even number"

    Are you saying it took 7 drops of R-0009 to turn the 25ml sample red? If so, your TA is 70. How did you arrive at 7.2 drops?

    I'm still unclear on what the issue is that you are trying to solve. Can you give a little more detail?
    -Brian-
    33K Pool/Spa, Pentair Equipment
    POOL BUILD
    Davis Custom Construction - Home Page

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    Re: Fill Water loaded with PH

    I'm guessing at a PH of 14. It could be 10. I'm looking at the results after 5 drops and it is very pink / red. The PH is very high/.

    I'm just trying to determine what is causing the TA to climb. In the past 4 weeks, I'd say every week it goes from 7 to 8. The only thing I'm doing differently from the past is adding water to the pool. The fill water is very high in PH. I add acid once a week in order to lower the TA from 80 to 70, then goes back up. Do you think the high PH fill water is causing the TA to climb? thank you.
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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    Re: Fill Water loaded with PH

    PH doesn't make the TA rise. Really the only reason for a rise in TA is from outside sources like adding something with bicarbonate alkalinity.

    I still really doubt your fill water has a TA of 30. Your TA would be falling, not rising.

    Needing to add acid weekly is not out of the ordinary. I use an acid pump that delivers 22oz per day and even that doesn't keep up.

    Try targeting a pH of 7.8 and a TA of 50-60 and see how that works out for you.

    The pH sample you pictured above looks to be around 8.3- 8.4 which is pretty typical of municipal water supplies.
    -Brian-
    33K Pool/Spa, Pentair Equipment
    POOL BUILD
    Davis Custom Construction - Home Page

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    Re: Fill Water loaded with PH

    ok, thanks for your help. Appreciate
    28,000 gallon IG pool, plaster, built approx. 1970.
    1 1/2 " plumbing. Pentair, Intelliflo 3 hp variable speed.
    Crystal Water cartridge filter system, model #425
    Dolphin Deluxe 4,

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