The Calgon 3in1 Gel is a specialized washing machine additive designed to protect your appliance from the damaging effects of hard water. This 750 ml gel formula works by rapidly softening water through the neutralization of hard minerals, which helps prevent new limescale deposits from forming on the heating element, drum, filters, and pipes. Beyond prevention, it actively removes existing limescale buildup from hoses, pipes, and plastic components to keep the system running efficiently. Because it is effective at temperatures as low as 30°C, you can use it during your regular laundry cycles to maintain the internal health of your machine and extend its operational life.