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Thread: Ph Testing question ???

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    Ph Testing question ???

    So everything has been going great with the swim spa so far. However, the last 3 times I have tested Ph using a Taylor K-2006 test kit, the ph has read low, like 7.2 but if I re-test it right away with the same water sample it shows 7.6.
    The first time I figured I had the wrong number of drops ... the second time I was suspicious ... but just now it has done it a third time.
    Could the reagent be going bad? It was a brand new kit last September.

    Any suggestions would be great!
    Thanks,
    Bruce in Sb
    Swim-Ex 400 paddlewheel swim spa - 3000 gallon -Pentair CCP-320 - Coates 11KW heater - 1/2 hp pump - Outside in pit

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    Mod Squad woodyp's Avatar
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    Re: Ph Testing question ???

    If the kit has been kept indoors and cool, the chems should be just fine. Look at it up against a white background.
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    Re: Ph Testing question ???

    It has been stored indoors so I'm sure it's OK. The color change goes from Yellow to Pink with the same water sample and number of drops. I use the same white background every time so something new is happening..
    Thanks ...
    Swim-Ex 400 paddlewheel swim spa - 3000 gallon -Pentair CCP-320 - Coates 11KW heater - 1/2 hp pump - Outside in pit

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    Re: Ph Testing question ???

    Any other ideas as to why this is happening?
    Swim-Ex 400 paddlewheel swim spa - 3000 gallon -Pentair CCP-320 - Coates 11KW heater - 1/2 hp pump - Outside in pit

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    Mod Squad jblizzle's Avatar
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    Re: Ph Testing question ???

    Something contaminating the vial that gets washed out in the first test?

    Buy another bottle, only a few bucks. See if that helps.
    Jason, TFP Moderator
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    Re: Ph Testing question ???

    Are you rinsing the tube and cap before and after each test?

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    Re: Ph Testing question ???

    Good idea... I'll try a new collection bottle and rinse the tester tube better tomorrow...
    Thanks for the suggestions!

    Quote Originally Posted by jblizzle View Post
    Something contaminating the vial that gets washed out in the first test?

    Buy another bottle, only a few bucks. See if that helps.
    Swim-Ex 400 paddlewheel swim spa - 3000 gallon -Pentair CCP-320 - Coates 11KW heater - 1/2 hp pump - Outside in pit

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    Re: Ph Testing question ???

    Sometimes people use their hand to cap the tube. If they have anything on their hand, it could contaminate the sample.

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    Mod Squad jblizzle's Avatar
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    Re: Ph Testing question ???

    I meant another bottle of reagent ... not a collection bottle.
    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
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