Salt pellets or crystals (solar, evaporated, potassium chloride) regenerate ion-exchange resin in water softeners. Solar salt ( 5 – 5–15/bag) is cost-effective; potassium chloride ( 25 – 25–40/bag) suits low-sodium diets. Choose based on purity, system compatibility, and hardness level https://pearlwater.in/water-softener-spares/water-softener-salt-tablets-25-kg