All Exaqua photometers, regardless of the model (PRO3 or PRO6) are supplied with the Exaqua Z-methods pack.
Z-methods pack contains 3 licenses:
Exaqua Basic methods
Exaqua Marine methods
Exaqua Exatitr methods
The above doesn’t apply to Exaqua photometers which were purchased as a stand-alone devices without the transportation case and basic accessories.