Thanks for the reply! So ignore the other 2 test methods then?

The instructions (Taylor) say for the 1st test "record as ppm FC." The next step, after 5 drops of R-0003 says record as TC. Last part says "subtract FC from TC. Record as ppm CC. Formula: TC-FC=CC. After step 1 it shows 2. After step 2 it shows 1.

So, I am confused, do I have 2 ppm FC, 1ppm TC and 1ppm CC? That's not posible right?

Thanks again and again!!