Product review (1 stars): Consumer Be Warned
Consumer be warned!  My wife has diagnosed asthma.  We started using this product in our 5.2 gallon whole house humidifier in December, 2015.  Almost immediately, she began to experience a serious increase in her symptoms for which doctors prescribed maximal doses of steroids.  Her symptoms only grew worse, much to the consternation of her doctors.  I searched for  changes in environmental factors that could be triggering my wife's asthma attacks, and the only one I could identify was the humidifier and the Best Air bacteriostatic treatment.  We were using the correct amount of disinfectant for the volume of water in our humidifier.  After 3 months, my wife's symptoms were so severe she could no longer exercise, go for walks, or even speak without becoming seriously short of breath.  We decided to eliminate the humidifier entirely.  The very next day, her asthma symptoms improved, and have continued to improve.  She can now exercise and go for long walks without becoming short of breath.  My best guess is that her symptom improvement may have been tied to the elimination of the Best Air  water treatment.  The humidifier was entirely free of mold, slime, or other signs of biological contamination.  If you have any respiratory difficulty, please consider your purchase of this product carefully, and be sure to read the label.  Google the ingredients list - you will be shocked at what you will read.