The active components of the Microcell are very robust versus degradation. In average quality drinking water, a service life of one year in continuous operation has been verified. At the beginning of a continouos operation the cells need a running-in period of approx. 10 days. During that time the cell voltage increases slightly and the ozone production rate decreases slightly. After that a steady-state phase follows usually. In very hard water calcification on the cathode might lead to cell voltage over 15V. The lifetime of the cellhearts can go down to several 100 hours. This effect has been minimized – however not eliminated completely – through our new cellheart design.