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Thread: Is my pH too high or too low?

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    Is my pH too high or too low?

    In an effort to bring down my TA, I lowered pH and then ran my spillover.
    I believe that I ran the spillover for far too long, and drove my pH way up.

    I am using the standard color block test (it's the only pH test I have or know about) and the color I get doesn't match anything.
    It is coming out as a burnt orange/borderline reddish color.

    Like I said, I'm fairly certain that my pH is too high, but I have added a good bit of acid and haven't seen much of a change. Not knowing what my pH is
    has me groping in the dark somewhat.

    Any suggestions on how long to let the water flow/mix after putting in acid before I test?

    Thank you!

    SF
    =====================================
    17K gallon IG freeform Pebble-Tec pool w/ raised spa/waterfall, Hayward 6020 DE filter, Tristar 1 HP circulation pump, Tristar 2.5 HP spa pump, Silencer 2hp blower, Aquarite SWG, Polaris 280 w/ booster pump, Hayward Universal H-Series 400K LPG heater, Ultrapure Ozonator 25, Aqualogic PS-8

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    Mod Squad jblizzle's Avatar
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    Re: Is my pH too high or too low?

    Orange sounds in the middle of the range. It gets very pink/red when the pH is too high and more yellow when the pH is too low.

    The acid should mix for an hour or so before you test again.

    What is your TA level? I think it usually takes a day or 2 for the pH to drift up with a lot of aeration, unless the TA is very high.
    Jason, TFP Moderator
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    Re: Is my pH too high or too low?

    My TA had reached 130. I will test again shortly and post new numbers.

    The burnt orange color I'm seeing is not the same as the lighter orange on the color block. It's much deeper in hue, and looks very close to red.

    SF
    =====================================
    17K gallon IG freeform Pebble-Tec pool w/ raised spa/waterfall, Hayward 6020 DE filter, Tristar 1 HP circulation pump, Tristar 2.5 HP spa pump, Silencer 2hp blower, Aquarite SWG, Polaris 280 w/ booster pump, Hayward Universal H-Series 400K LPG heater, Ultrapure Ozonator 25, Aqualogic PS-8

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    Mod Squad jblizzle's Avatar
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    Re: Is my pH too high or too low?

    TA of 130ppm is not really that high (relative to some members who of 300+ out of the tap).

    Not sure if this additional info is helpful:
    extended-test-kit-directions-t25081.html#p206394

    You could try using an extra drop of reagent (I think you can also try only using 4 drops) and see if the color matches up a little better for you.
    Which kit are you using? If it is the K2006, you can use the acid demand reagents to shift the colors to match and then know where you started from.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Is my pH too high or too low?

    Thanks Jason - I will review that link and see if I can get what I'm looking for.

    I just took a full set of test results - there is some strangeness going on.

    FC 19.5 (yes, that's correct!)
    CC 0
    TC 19.5
    pH ??
    TA 120
    CYA 70
    CH 500 (ish...at 50 drops the water turned more clear than it did blue)

    I have to think that my pH is way high and that is skewing my chlorine number making it inaccurate. Is that possible?

    Here is a photo of my color block to get an idea of the red I'm getting when testing pH:

    =====================================
    17K gallon IG freeform Pebble-Tec pool w/ raised spa/waterfall, Hayward 6020 DE filter, Tristar 1 HP circulation pump, Tristar 2.5 HP spa pump, Silencer 2hp blower, Aquarite SWG, Polaris 280 w/ booster pump, Hayward Universal H-Series 400K LPG heater, Ultrapure Ozonator 25, Aqualogic PS-8

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    Mod Squad jblizzle's Avatar
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    Re: Is my pH too high or too low?

    Oh, well the FC is a good piece of info ... reason being, the pH test is not accurate with FC > 10ppm.

    In fact in the link I provided, it states that around 20ppm the regent "converts to chlorphenol red and will read as 8.2 at any plausible pH level" (that is certainly more red than I have seen)

    .... so there's your problem
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Is my pH too high or too low?

    I just read that in the link you sent.

    But I have to tell you - I'm on an SWG, and it's set to run at 45%. I didn't even think it could push the FC to that high of a level.

    I wonder what is going on that is making my FC rocket up like that?

    I suppose I could turn my chlorinator off and watch to see if the FC level starts coming down - I'm assuming it will. I have run at 45% for a long while now - perhaps there is an error in my SWG?

    Thanks for the pointers Jason!

    SF
    =====================================
    17K gallon IG freeform Pebble-Tec pool w/ raised spa/waterfall, Hayward 6020 DE filter, Tristar 1 HP circulation pump, Tristar 2.5 HP spa pump, Silencer 2hp blower, Aquarite SWG, Polaris 280 w/ booster pump, Hayward Universal H-Series 400K LPG heater, Ultrapure Ozonator 25, Aqualogic PS-8

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    Mod Squad jblizzle's Avatar
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    Re: Is my pH too high or too low?

    How long are you running the pump? What size is your SWG?
    The % setting is the amount of time the cell is generating while the pump is on.

    So, multiple ways to get the same FC addition each day:

    Run pump 8 hours with 25% setting, generating for 2hours.
    Run pump 4 hours with 50% setting, generating for 2hours.

    If your cell is oversized as we recommend, you obviously need to lower the % or the run time ... does this reveal the fact that you are not checking your FC every couple days
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: Is my pH too high or too low?

    HA! Busted!

    Thinking back a bit, I believe I used to run my SWG in the 10-15% range.
    Earlier this summer, I let my CYA get low, had an outbreak and shocked to clear it up.
    I overshot CYA on the way back up and had to ramp up my SWG %.

    Now that CYA is back in line, I think the SWG drove the FC way up, and it I didn't notice until too late due to laziness.

    Mystery solved?

    I have put a bunch of acid in the pool, so my pH is actually probably very low...rats!

    Thanks Jason,

    SF
    =====================================
    17K gallon IG freeform Pebble-Tec pool w/ raised spa/waterfall, Hayward 6020 DE filter, Tristar 1 HP circulation pump, Tristar 2.5 HP spa pump, Silencer 2hp blower, Aquarite SWG, Polaris 280 w/ booster pump, Hayward Universal H-Series 400K LPG heater, Ultrapure Ozonator 25, Aqualogic PS-8

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