Product review (1 stars): Didn't work
I bought this product to help reduce or eliminate the white dust caused by my ultrasonic humidifier.  It is also supposed to help prevent buildup on the inner workings of the unit.  I can't speak for the inside of the unit, but I can truly say it did not help with the white dust issue at all.  I will either have to use distilled water or buy a new humidifier.