The Finish special dishwasher salt offers effective limescale protection for dishwasher, crockery, cutlery, spray arms and filters – for a long life of the dishwasher. - Finish Dishwasher Salt- Keep your dishwasher clean and your dishes even cleaner with this dishwasher salt from Finish. - It helps to soften water, which prevents limescale and watermarks. - 100% better machine protection - To avoid water marks on your dishes, dishes must be washed with soft water. How to use: Fill the tank according to manufacturer instructions