Humiditreat Extra Strength Humidifier Water Treatment 32 oz. Extra Strength Water Treatment: Prolongs the life of the filter, controls unpleasant odors and prevents lime & scale build up. Improves the effectiveness of your humidifier and wick, maximizing the humidity released into the air. Made in the USA. Humidi-TREAT Humidifier Water and Scale Treatment is for use in all portable evaporative humidifiers and is specially formulated to prevent lime and scale buildup and remove impurities from your humidifier filter. Usage: Used in All Portable Evaporative Humidifiers and is Formulated to Prevent Lime and Scale Buildup