CLARIS Pro Blue works according to the professional up-flow principle and always filters exactly the amount of water required for each preparation. Thanks to the pioneering formula, the filter cartridges are ideally suited to mains water anywhere in the world. The modified granule always filters limescale to an optimum level (even when the water hardness is low) and reduces the level of all harmful substances more efficiently than ever before. Minerals and fluorides that are important for helping flavours to develop are fully retained in the water. The optimum stabilisation of limescale and efficient filtering of harmful substances always results in optimum water quality for a perfect coffee flavour. Used correctly, CLARIS removes the need for descaling completely. This makes your machine easier to use and saves you valuable time. Clean pipes, heating elements and a pump without calcium deposits demonstrably extend the life of your automatic machine and help it to retain its value. Only original CLARIS filter cartridges are matched precisely to JURA automatic machines in terms of composition and throughflow. Be sure to look out for the JURA seal of quality when buying filters. You will find this is well worthwhile.