Use the water purifier now have 2 months monthly filter replacement. Since I had not yet descale the kettle. In this respect considers Brita your promises. But I am bothered that many carbon particles rumschwimmen the "filtered" in the water. Even if the Brita not considered harmful and the package insert evokes that these particles are harmless and simply Eliminated ..... are, I have my doubts about this "harmlessness".