Friendly contact. Good advice. Quick installation on 9 April 2021. We are a family of four and actually only need two bags of salt per year. However, our toilet flush gets its water from a cistern. Our annual water consumption has been around 100 cubic metres so far. The water hardness was previously between 15 and 18. The system is set to 6. For the past few days, we've been using the kettle daily for tea. Before, a layer of limescale would quickly build up. Now it's still sparkling clean. My neighbor has the same kettle and is also very happy with it.