Product review (3 stars): Prefer the BestAir Combo.
Used this product in combination with another Best Air mineral treatment for a number of years. Expensive using two products with only partial or unsatisfactory results.  We have gone to the BestAir Combo product now using one container instead of two.  We suggest the Combo but still are required to make extensive cleaning of bacteria (slim) and mineral buildup every six months or more often.  We run three Honeywell humidifiers continuously requiring 3 to 8 gallons of water a day.  We need a good inventor, where are you?