The Mineral Cube releases "structure-making minerals" into the water. It must be replaced after each 4020 minutes of operation.
The Vitalizer Plus is equipped with a digital timer that records the amount of running time. When it is time to change the mineral cube, "CC" (change cube) will appear on the digital display.
For a single person making one batch (0.6 gallons/2.2 litres) of 9-minute water every day, the mineral cube will last well over 1 year (15 months).