This doesn’t work with ultrasonic humidifiers! I didn’t realize this until after I purchased and read the teeny writing on the back. Now I’m stuck with 5 and a half bottles of this stuff (one of the bottles was leaking into the box, haha). Smells nice, though.
Righto, you don’t need to add bacteriostatic treatments to an ultrasonic humidifier. It’s the evaporative ones that suck this stuff down 'cuz who needs to be blowing moldy water around their house?