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Thread: What are the precipitates during TA test?

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    Ronald U.'s Avatar
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    May 2015
    Pearland, Texas (near Houston)

    What are the precipitates during TA test?

    Just curious about the chemistry. Usually once I begin to add R-0009 I notice some stringy precipitates form. What are those, exactly? Thank you.
    In-ground gunnite, 24k gal., Hayward DE filter, bleach, borate, Hayward Tiger Shark robotic cleaner, 75% full sun

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    JoyfulNoise's Avatar
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    May 2015
    Tucson, AZ

    Re: What are the precipitates during TA test?

    I have never seen that before. The R-0009 is simply sulfuric acid that consumes alkalinity and eventually shifts the pH of the sample below 4.5 which is the green/red transition point.

    Is your R-0008 indicator dye old? It can go bad with age, get clumpy and start clinging to the inside of the dropper bottle.

    Other than a possibly compromised indicator reagent, I have never seen what you describe.
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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