The saltless softener is a device many homeowners turn to save money on their water bills. It does not use salt (sodium ion) to soften the water but instead uses ionization. Ionization is a process where the water molecules are charged with an electrical current. To improve the softening water performance, it is essential to know the difference between pool salt, softener salt, and ordinary boxes of table salt/ sodium chloride. The cost will vary depending on the unit's size and features. The most basic models start at around $399.95, while more advanced models cost $1,000.