An apparatus for conditioning an aqueous liquid, e.g. drinking water, includes a first liquid treatment section (323) including a liquid treatment medium for reducing at least the carbonate hardness of water brought into contact with the medium. The apparatus includes a second liquid treatment section (424), separate from the first liquid treatment section (323) and including a liquid treatment medium for releasing potassium into water brought into contact with the medium. The apparatus is configured to provide the treated water with a potassium concentration of at least 30 mg·l-1.
