In-line mineralizing cartridges filled with high quality media which enhances water with minerals (calcium, magnesium). The cartridge is filled with high quality dolomite media. Calcium is an ingredient of bones and teeth, contributes to muscle contractions and plays an important part in hormone release. As for magnesium, it takes part in more than 300 biochemical processes and is necessary for the neurological and immunological systems to work correctly. The structure of our cartridges was designed in such a way that their assembly and replacement is easy and does not require any specialized tools. The size of grains enables water to stay in touch with the media longer and to ensure a better mineralization.