Using DC voltage between 5 and 15 V the Microcell splits the water into its element according to the following equation:
H2O -> H2 + n/3 O3 + (1-n/2) O2
Oxygen and ozone are generated on the anode and hydrogen on the cathode. The percentage of ozone formed depends on the current efficiency. The useless byproducts H2 and O2 dissolve in the water or are released as gas. As the generation rate of those gases is very low there is no risk of explosive gas accumulation.
Electrolysis causes a pH-gradient within the cell: the anode area gets acidic and the cathode area gets basic. In total the water will not change its pH-value. However the change of pH-value near the cathode causes precipitation of carbonates (esp. Calcium) which may lead to incrustation and, in the long term, failure of the cell. The microcell technology has been upgraded to cope with water hardness.