When your sample from each tap is on the extremely diluted side the differences in color are easy to spot.. This was an approx 18F spread on the refractometer. NOT GOOD!!!
Merely seeing pink is not the proper way to winterize your system!!
FujiFilm FinePix XP70 XP71 XP75 1/15s f/3.9 at 5.0mm iso800
full exif