Expert filtration for superior limescale reduction. BRITA filtered tap water not only tastes pure and fresh, but also reliably protects kitchen appliances from Limescale. Innovative 4-stage filtration with ion exchanger pearls and natural activated carbon from coconut shells: Specifically useful in regions with hard to very hard water, the MAXTRA PRO Limescale Expert reduces limescale 50% more effectively than the BRITA MAXTRA PRO All-In-1 cartridges and reduces taste-impairing chlorine and metals like lead and copper.