Calgon 4in1 Power Gel is a fast-acting water softener designed to protect your washing machine from limescale, dirt, odours, and rust. Its concentrated formula begins working immediately, safeguarding internal components like the drum, pipes, and heating element. Suitable for use with all types of laundry detergents, simply add 1 cap (50ml) per wash to maintain your machine's efficiency and extend its lifespan. In areas with very hard water, use 1⅔ caps (83ml). Each 750ml bottle provides up to 15 doses.