Hard water problems: Calgon to the Rescue. Up to 3 times better than the rest!. Fast dissolving layer technology protects all vital parts of your washing machine from lime scale, from the very beginning of the wash. Calgon not only neutralises limescale in the water but prevents it from forming in the first place. Dual action - Blue layer dissolves within seconds to neutralise lamescale from the start of the wash, the white layer then combines with the blue layer to keep protection constant throughout the whole wash. Contains 15 express balls. Calgon prevents limescale build-up in your washing machine to protect the heating element, pipes and drum of the machine. It is completely safe for all fabrics and colours and has a unique phosphate-free formula. Calgon is for use in every wash at all temperatures. With Calgon you only have to use the minimum amount of detergent advised for washing in soft water areas and so can save up to 30% on detergent. 225g. Recommended by Candy, Hoover, Bosch, Whirlpool, Siemens, Electrolux. For use with washing machines only.