Aqua Prima in-tank water filter cartridges reduces the build up of scale in your Saeco coffee machine, thereby extending its life. The Aqua Prima water filters remove particles and impurities to create better tasting coffee while also reducing limescale to keep your espresso machine happy and healthy. Please Note: The activated carbon of Aqua Prima filters decreases the concentration of substances that impair the flavour and odour of water (organic compounds, chlorine etc.), while a special macroporous filter integrated in the cartridge filters out the microparticles present in water. Filters should be replaced every 3 months to ensure optimal performance.