Calgon 3in1 water softener gel is a fast acting way to provide complete protection and maximum efficiency for your washing machine. Simply add Calgon 3in1 gel to each wash in addition to your usual detergent for total 1) Limescale prevention, 2) Detergent Residue and Dirt removal and 3) Odour elimination, to keep your washing machine clean. Calgon gel begins acting immediately to neutralise limescale and prevent dirt residue, leaving your washing machine healthy and your clothes protected in eve