When I add the drops to turn the color from pink to clear, the water turns clear and then after a minute turns back to a pink. Should I continue adding drops when this happens or record the number of drops it took to get it to clear initially?
I spoke with Wayne Ivusich, the Manager of Education & Technical Services at Taylor regarding some conflicting information my local pool store gave me about how to "correctly" do the test. They stated that you have to "add an extra drop or two" of the titrating reagent once your FC test has gone clear. Per Wanye, that information is not correct. You add your titrating reagent until the sample is colorless, and then proceed with the CC test.
The FC test should not sit for more than 30 seconds otherwise you will start to see the color changing back ever-so-slightly pink and thus have skewed results.
The CC test should be read immediately after it turns colorless as it will turn pink again within a minute or two.