BestAir HCC31, Humidifier Demineralization Treatment Capsule, 1, Pink & Green Humidifier Demineralization Treatment Capsule Easy and simple use kit Made in China Refer directions to use at the back of the pack For use in ALL types of humidifiers: Cool mist, warm mist, ultrasonic & vaporizers Antimicrobial treated to prevent the growth of odor causing bacteria & mold. Helps keep tanks clean of hard mineral deposits. Eliminates the need to add chemicals every time you add water to the humidifier tank.