i tested FC for 1 month with K1001 and the color result was always around 5ppm, but when i finally could buy new R-0870 and the big bottle of R-0871 , i added water to 10 ml mark and put 1 big dipper of 0870 and than i had to add 36 drops of R-0871 to get colorless ,doing the math i get 18 ppm ,how is that possible?