High Combined Chlorine

He is using a k-2005 so using R-0003 for CC test in comparator box after test FC add 5 drops and compare color immediately. Correction: sorry it's TC and then subtract for CC
That test isn’t so accurate numerically. It’s more of a “do I have chlorine at all?” type of test.
 
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UPDATE: received my FAS-DPD test today and just tested after getting home. Results are as follows:

FC 7.4
CC .2

Thanks for the help everyone! Not sure what happened but it appears to be all good now
Now that you have the test, use the 10ml water sample. It’s plenty accurate and easier to do the math.
 
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