PureGuardian FLTDC20 Humidifier Maintenance Kit Includes accessories to keep your PureGuardian running smoothly Reduces hard water build-up and keeps water reservoir free of bacteria Includes FLTDC20 Humidifier Decalcification Filter Includes Ger Guardian GGHS15 AquaStick Humidifier Treatment Compatible with PureGuardian H1200, H7550 and H7500 Humidifiers