Product review (5 stars): Couldn't live without
This is a humidifier/filter saver. First, I had to replace my whole humidifier unit due to mold. So after purchasing two new humidifiers, I began researching how to extend their usage. That research led me to this bacteriostat. I've been using the stuff for a year and a half and have only purchased another bottle. (My humidifiers 1.5G, which means I only use a cap full.) I use both humidifiers each night, all year long. The bacteriostat also extends the life of my humidifiers' filters, which I change every 9-10 months. It isn't even due to mold, but the every night use.