Yes, the pool store told me my FC and TC is 2 and it is on right number.
1. My TF-100 test, first the Chlorine and pH test, the left side is very orange and no color is match to this dark orange color.
2. The TA test normally it should be from green to red, but if high chlorine it will from blue to yellow (NOTE: In the presence of high chlorine, initial color may be blue and shift to yellow. Test is still valid.), so i believe my Chlorine test is very high.
3. I used 5ml water to test (don't want to use too much R-871), so i keep adding and the color is pink, until 37, 38, it did turn to clear color.
I believe my TF-100 test is more accurate. My pool just opened yesterday and the pool store added the liquid chlorine to my pool (I believe 5 gallons?). My question is after winter, the chlorine should drop to 0 when you open in spring right?