Water softening equipment is used to treat the hardness in water, and saltwater is required in the entire water treatment system to exchange with the resin. Since the water softening equipment uses saltwater to exchange with the resin, saltwater needs to be added to the system. The ratio of saltwater addition is generally not fixed; typically, you should open the salt tank lid and visually check the saltwater level, ensuring it does not fall below one-third of the salt tank. It is crucial to add salt before the salt in the softening water equipment's salt tank is completely used up. As for the amount of salt to add, you can add it moderately, but make sure that when the water is replenished for salt absorption, it does not overflow your salt tank. Salt is a continuously consumed consumable for water treatment, so it should be added regularly. Generally, a quarter of a standard salt tank is sufficient.