22.Must I really change the “cartridges” in Aqua Vie or Columbia D according to their specifications or can I continue using their internal “cartridges” for longer without replacing them?

The “cartridges” must be changed once a month because they are made like this in order to enrich water with the necessary metallic salts. They must moreover be changed every month because of the pharmaceutical carbon they contain. The life duration of a cartridge is of one month from the moment it is used.