The Grohe Blue Magnesium + Zinc Filter Starter Set is the sustainable solution for delicious mineral water straight from the tap. Enjoy premium hydrating refreshment with just a turn of the faucet thanks to the Grohe Blue Magnesium + Zinc Filter Starter Set, which enriches the water with up to 35 mg/l of magnesium and up to 3 mg/l of zinc. The intelligent filter technology removes unwanted substances and impurities responsible for unpleasant taste and odor, such as chlorine, and reduces heavy metals. It also minimizes limescale to protect your household appliances and enhance the taste of the water. The process transforms spring water into pure premium drinking water with a clear, fresh, and improved taste, along with additional minerals for your well-being and vitality. The filter has a capacity of 400 liters (at 17° dGH). A flow meter with a digital display, powered by two AA batteries, monitors the filter's lifespan and informs you when it needs to be replaced. Simply unscrew the used cartridge and screw in the replacement cartridge. The filter system is compact and designed to take up minimal space under the sink. It is compatible with all Grohe Blue Pure single-lever faucets.