Grohe Blue Activated Carbon Filter - 40547Grohe Blue Activated Carbon Filter 40547 Activated carbon filter designed to improve water taste and purity in soft water regions. Features Improves water taste and odor Reduces chlorine and trace substances such as pesticides Designed for areas with water hardness below 9 dKH (160. 98 ppm) 3 stage filtration system (coarse, carbon, fine filtration) Filters dirt particles and fine impurities Compatible with GROHE Blue systems High capacity of 3000 L