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Thread: Question about CH test with tf100

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    Question about CH test with tf100

    I ran a Calcium Hardness test with the tf100 kit. I filled the cylinder to 25ml. I added the 20 drops of r-0010. Then added 5 drops of r-0011L. The sample was suppose to turn red but it turned a pale pink. Then I added drops of r-0012. At 25 drops, the sample became clear. I continued to add and stopped at 70 drops and the sample never turned blue. I then redid the sample adding 2 drops of r-0012 prior to adding R-0011L in case of the presence of copper but I had the same results. Do I not have enough calcium to turn the sample red or do I have another problem?

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    Richard320's Avatar
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    Re: Question about CH test with tf100

    The exact shade isn't as critical as the change. When it went clear is probably when it turned blue. You can always add a few extra drops of the R-0011L to get a deeper color. Then the color change should be easier to see. Also, how old are those reagents? If the R-0011 bottle is discolored at all, the stuff inside has gone bad.
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    Re: Question about CH test with tf100

    Ok, thanks. the bottle is not discolored, reagents about 3 yrs old.

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    Richard320's Avatar
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    Re: Question about CH test with tf100

    Quote Originally Posted by slayer View Post
    Ok, thanks. the bottle is not discolored, reagents about 3 yrs old.
    That's too old.

    Did you know you can get a complete refill set for the test kit without any of the hardware pretty inexpensively? TFTestkits.net
    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: Question about CH test with tf100

    Thanks

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