What Is a Saltwater Pool?

A saltwater pool is a swimming pool that uses a salt chlorine generator (SCG) to produce chlorine from dissolved salt rather than requiring the manual addition of liquid or tablet chlorine. Salt — typically sodium chloride — is added to the pool water at a concentration of 2,700 to 3,400 ppm. The salt cell converts this salt into chlorine through electrolysis, providing a continuous, automated supply of sanitizer.

How Saltwater Pools Work

The salt chlorine generator consists of a control unit and an electrolytic cell installed in the pool’s plumbing return line. As water flows through the cell, a low electrical charge splits the dissolved salt molecules (NaCl) into sodium and chlorine. The chlorine sanitizes the pool water and then recombines with sodium to form salt again, creating a self-renewing cycle.

Despite the name, saltwater pools are not chlorine-free. They produce the same hypochlorous acid as traditional chlorine pools. The difference is in the delivery method — the salt cell generates chlorine continuously and at lower, steadier levels rather than the peaks and valleys of manual chlorination.

Saltwater Pool Popularity in Central Florida

Saltwater pools have become increasingly popular in the Orlando and Central Florida market over the past decade. The appeal is straightforward:

Lower maintenance: The automated chlorine generation reduces the frequency of chemical additions
Softer water feel: The low salt concentration creates water that feels smoother on skin and does not have the strong chlorine smell of heavily dosed traditional pools
Reduced chemical costs: Salt is inexpensive compared to liquid chlorine or tablets over time
Consistent sanitization: The continuous generation maintains more stable chlorine levels

How Salt Affects Pool Tile and Surfaces

While saltwater pools offer convenience advantages, the salt environment creates specific challenges for pool tile, coping, and surrounding hardscape:

Accelerated corrosion: Salt is corrosive to certain metals, stone sealers, and some coping materials. Limestone and unsealed natural stone coping can deteriorate faster in saltwater pools.
Salt cell calcium deposits: As the salt cell operates, it raises the pH of water passing through it, which promotes calcium scaling. This scale often shows up on the waterline tile first.
Coping and deck damage: Saltwater splash-out can accelerate deterioration of natural stone coping and concrete pool decks if not regularly rinsed
Grout erosion: The slightly more chemically active saltwater environment can wear down tile grout faster than traditional chlorine pools

Tile and Material Selection for Saltwater Pools

Pool owners converting to saltwater or building a new saltwater pool should select materials rated for salt environments:

Tile: Glass and porcelain tiles perform well in saltwater. Certain natural stone tiles may be more susceptible to salt damage.
Coping: Travertine and concrete pavers handle salt well when properly sealed. Soft limestone should be avoided or sealed diligently.
Grout: Epoxy grout resists salt erosion better than standard cement grout
Thinset: Pool-grade, polymer-modified thinset is essential — standard thinset degrades faster in saltwater conditions

Regular maintenance of water chemistry, particularly pH and calcium hardness, is even more critical in saltwater pools to protect tile and surface investments.

What Is Saltwater Pool?