Product review (5 stars): This evaporative unit thrives on just a few drops of this product per gallon
I am using this product with the Airfare MA0800 evaporaive humidifier. The water has not become slimy or in anyway bad in the humidifier. Some days the humidifier does not run because there is enough humidity. I was concerned whether I should empty the unit and refill later. But, the true test was to let nature take its course. I am happy to report that the water has been fine without a need to employ the unit.