TA readings with high FC?

[JesseWV]

I know pH readings are skewed when FC is above 10. Are TA readings also affected?

Example:

3/27/14
FC: 15.5
CC: 0.5
pH: 8.4
TA: 120

4/8/14
FC: 5
CC: 0
pH: 6.9
TA: < 30 (turned at 2 drops, slightly pinker at 3)

 

[JasonLion]

The TA test is fine at high FC levels. The colors it turns will sometimes be a little different, but the results are still valid.

 

[JesseWV]

In that case I am very puzzled. I did the test twice on 3/27. I was properly wiping the tip on a dampened towel between each drop. It was 12 drops each time. The 13th drop didn't change the color. 11 days later I've somehow lost 75% TA!?

The TA test is fine at high FC levels. The colors it turns will sometimes be a little different, but the results are still valid.

 

[JasonLion]

Your PH has also come down dramatically. Presumably you added acid to bring down the PH, which will have also lowered the TA level.

 

[JesseWV]

I didn't add any acid. I assumed the high pH was only due to the high FC. Still wondering what happened.

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