Grohe Blue Magnesium + Zinc Filter - 40691Grohe Blue Magnesium + Zinc Filter 40691 Water filter designed to improve taste and enrich water with essential minerals. Features Enhances water with magnesium and zinc Improves taste and aroma of drinking water Reduces chlorine taste and odor Filters trace substances such as pesticides Reduces lime and heavy metals Uses activated carbon and magnesium ion exchanger resin Enriches water with up to 35 mg L magnesium and up to 3 mg L zinc Compatible