Humidifier Pads should be changed twice a year. One package of pads includes two pad changes.
The 500 ml bottle should last about two years.
WARNING: Add only Dampp-Chaser PAD Treatment to the Humidifier water. Other brands of water treatment contain acids which corrode strings and metal parts in the piano. The use of other water treatments will void the warranty of the Piano Life Saver System and may void the warranty of the piano manufacturer.
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