How each one works
A saltwater pool uses a chlorinator to make chlorine from dissolved pool salt. A mineral pool uses magnesium and potassium based minerals to sanitise the water, usually with a small chlorine backup. Both reduce how much chlorine you handle directly - a mineral system reduces it further.
Cost comparison
Saltwater is the lower-cost of the two. The mineral additives in a mineral pool cost more over time than pool salt, so a mineral pool has a higher ongoing chemistry cost. Upfront, a mineral system also tends to sit higher than a saltwater chlorinator.
- Saltwater: lower upfront, lower ongoing, salt cell replacement every 5 to 8 years
- Mineral: higher upfront, higher ongoing, the gentlest water of the common systems
How the water feels
Mineral water is the softest of the common options - many people describe it as silky, and the magnesium content is often cited as pleasant on skin. Saltwater is also soft, noticeably gentler than traditional chlorine, just not quite as soft as mineral.
Which to choose
If the gentlest possible water is the priority and the higher ongoing cost is acceptable, mineral is the choice. If you want soft water at a lower running cost, saltwater is the better value. Ask each network builder to quote your preferred system as a line item so you can compare.