Approximately 85% of the U.S. has hard water and those that don't still have harmful chemicals and minerals! Uncover hard water culprits quickly with our “Just Add Water” Water Testing Kit, your at-home detective for mineral overload. Just dip and check! It helps pinpoint calcium and magnesium, along with chlorine, affecting your hair. Salons and homes alike use ours to help choose the right products and treatments and finally get that soft, shiny payoff.