Calgon 3-in-1 Washing Machine Water Softener Gel 750mlWithout Calgon: Limescale, dirt and detergent residues accumulate behind the drum, in the filter and in the pipes. This not only may cause your machine to break down, but also may be the source of malodours which prevent you from getting perfect laundry results. Ingredients 5 15% Polycarboxylates. <5% Benzisothiazolinone, Methylisonthiazlinone, Perfume.