Products Calgon offers you a range of anti-lime products for the maintenance of your machine: Calgon 4in1 removes limescale and removes residue for a machine that remains efficient and clean, wash after wash. Calgon 4in1 Powder Calgon 4in1 Gel Calgon 4in1 Tablets Calgon Anti-Bacterial Gel Calgon Eco Gel Calgon Hygiene Tablets