Product review (1 stars): Stay Away
Used this in my Sears Kenmore humidifier and within two months it was producing a stale, offensive odor that was smelling up the house. I took the top off the humidifier and the four filter wicks were pink and black and absolutely reeked. I had to purchase new filters and completely clean the humidifier in order to remove the smell. I never had this happen in the 6 years I have owned this particular humidifier. This was, however the first year I tried this so called water treatment. STAY AWAY FROM THIS.