Saltwater or Chlorine Pool? What Building Pools Since 1989 Has Taught Us

Most homeowners who walk into our showrooms ask the same question first: should I build a saltwater pool or a chlorine pool? After building pools across North Carolina and South Carolina since 1989, my honest answer is this: nearly every new pool we install is saltwater. Most homeowners who try saltwater do not go back. That said, chlorine pools are not inferior, and there are real situations where chlorine is still the right call. This is the honest version of that decision, the misconceptions we correct every week in our Greenville, Charleston, Arden, and Franklin showrooms, and what I would build for my own backyard.

The short answer

If you are building new and the upfront cost works for your budget, build saltwater. If you have an existing chlorine pool and are tired of hauling tabs and chasing chlorine levels through the week, convert it. The exceptions are indoor pools and budget-tight new builds, where chlorine is genuinely the better choice. Everything else is detail.

We rarely build anything but saltwater

At Hot Springs Pools & Spas, we have gone at least a year without installing a new chlorine pool on a fresh build. That is not us pushing customers toward something they did not ask for. It is customers showing up already convinced, and our experience installing both confirming they are usually right.

On the service side, we convert chlorine pools to saltwater all the time. Existing pool owners get tired of hauling chlorine tabs in from the garage, watching their chlorine drift through the week, and dealing with the spikes and dips that come with manual dosing. A lot of those conversions start with the customer telling us "my neighbor put one in and won't shut up about it."

What makes saltwater click for most homeowners is consistency. The salt cell generates a steady, low concentration of chlorine continuously while the pump runs. You are not chasing the chlorine level week to week. You are not shocking after every pool party. The water just stays where it should be, and the chlorine is gentler on skin and eyes because it never has to spike to compensate for letting it drop.

What saltwater actually is (and isn't)

Here is the part most homeowners miss when they first walk in:

A saltwater pool is a chlorine pool.

The salt cell uses electrolysis to turn dissolved salt into chlorine. Same sanitizer. Same end result. The only difference is how the chlorine gets into the water. With a traditional chlorine pool, you add it. With a saltwater pool, the cell makes it for you on demand.

Once you understand that, almost every other misconception falls apart.

Five things customers get wrong about saltwater

These are the corrections I make in the showroom and on service calls every single week.

1. "Saltwater is chlorine-free"

It is not. Saltwater pools sanitize with chlorine, generated on site instead of dosed manually. If you want a genuinely chlorine-free pool, you are looking at UV, ozone, or biguanide systems, all of which have their own tradeoffs and costs.

2. "I don't have to test or balance the other chemistry"

You still test and balance pH, alkalinity, calcium hardness, cyanuric acid, and the rest. Saltwater pools actually push pH up over time, so most of them need more pH-down adjustment than chlorine pools, not less. The convenience of saltwater is in the chlorine generation, not in the rest of the water chemistry.

3. "The salt is what cleans the water"

The salt is the raw material the cell uses to make chlorine. The chlorine is what kills bacteria and algae. Without the cell running, salt by itself does nothing. We have had customers turn off the cell to "let the salt do its job" and then call us when the pool turns green a week later.

4. "If my chlorine is low, I should add more salt"

This is the most common service call we get on saltwater pools. The fix for low chlorine is almost never more salt. It is adjusting the salt cell output percentage, which controls how long the cell generates chlorine during the pump's daily run cycle. The percentage is a runtime setting, not a concentration setting. Cranking it to 100% means the cell stays on the entire time the pump runs. It does not mean more salt is somehow being added to the water.

5. "A chlorine pool is somehow inferior to a saltwater pool"

This one frustrates me. A properly maintained chlorine pool is just as clean, safe, and comfortable to swim in as a saltwater pool. The water-feel difference is real but smaller than marketing suggests. A weekly-checked chlorine pool with stable chemistry is genuinely indistinguishable in feel from saltwater for most swimmers. Saltwater wins on convenience, not on water quality.

Why saltwater works particularly well in the Carolinas

Two regional factors tip the scale toward saltwater here.

First, our swim season runs longer than most of the country. From late March through October across the Upstate, sometimes longer in Charleston, the pump is running and the pool is in active use. The operating cost advantage of saltwater compounds with use, so a longer season widens the gap between saltwater and chlorine over a five-year window.

Second, the Carolinas have relatively soft water compared to much of the country. Hard water is the enemy of salt cells: calcium scale builds up on the electrode plates and shortens cell life. Customers in hard-water regions need to acid-wash their cells every few months. In our region, that is closer to once a year for most homeowners. That extends cell life and keeps the maintenance burden lighter.

The real cost picture

Cost depends on pool size, equipment choices, and how long you keep the system running. The short version:

• Saltwater adds upfront cost (the salt chlorine generator and an initial salt load), typically a few thousand dollars day one above a comparable chlorine setup.
• Saltwater saves on chemicals over time, but the savings narrow once you factor in salt cell replacement every three to five years.
• Salt cell replacement cost has been climbing, mostly because of pressure on iridium and ruthenium prices (the precious metals used inside the cell).

Our sister site PoolGoods.com runs a full five-year cost comparison with current 2026 numbers and the supply chain story behind the rising cell prices if you want the detailed breakdown. We will not repeat the math here.

When chlorine is the better choice

Two situations where we will recommend chlorine over saltwater:

Cost-sensitive new builds. If the salt generator and the likelihood of a future cell replacement push the project over budget, chlorine keeps the equipment package simpler and the day-one cost lower. We would rather build you a clean, well-spec'd chlorine pool you can afford to enjoy than a saltwater pool that stretches the budget. The cost gap is real, especially as cell replacement prices climb.

Indoor pools. Saltwater plus indoor enclosure is a hard combination. The corrosive nature of salt accelerates wear on enclosure framing, HVAC components, and any metal hardware inside the space. We have seen it shorten the life of indoor pool rooms in ways that are not worth the convenience tradeoff. For indoor pools, we will usually steer you toward a well-designed chlorine setup or one of the alternative sanitation paths.

What I would build for my own backyard

Saltwater, without hesitation, for the consistency and ease of use.

If I were specifying the system for my own pool, I would also dose the water with borates. Saltwater pools drift pH upward over time, and borates help buffer that drift. They also have a few side benefits I like: a slightly silkier water feel, more algae resistance, and lower chlorine demand because the system isn't constantly fighting pH swings. Borates are something I recommend to my saltwater customers because it's not a standard part of most installs. If you are going saltwater anyway, it is a small upfront treatment that makes the water easier to live with for years.

That is the kind of detail you pick up when you both build pools and service them long-term. Our service teams across Greenville, Charleston, Arden, and Franklin see what works and what doesn't, year after year, across hundreds of pools.

Related decisions worth thinking about

Saltwater vs. chlorine is one decision in a stack of decisions. The pool type underneath it (fiberglass, vinyl liner, or gunite) matters at least as much. So does pump and filter sizing, which we cover in our guide to choosing the right pool pump. If you are still mapping out the whole project, our pool type comparison and maintenance checklist cover the rest of the questions homeowners ask us most.

Frequently asked questions

Is a saltwater pool actually chlorine-free?

No. Saltwater pools sanitize with chlorine. The salt cell uses electrolysis to generate chlorine from dissolved salt in the water. The difference from a traditional chlorine pool is how the chlorine gets into the water, not whether chlorine is there.

Why does my saltwater pool need pH adjustment so often?

Saltwater pools drift pH upward over time, partly because of the electrolysis process and partly because of off-gassing from the water. Most saltwater pool owners add pH-down (muriatic acid or dry acid) more often than chlorine pool owners. Adding borates can slow this drift.

How long do salt cells last in the Carolinas?

Cell life varies by pool size, run time, and water chemistry, but most cells in our region last three to five years. Carolinas water is relatively soft, which helps. Hard-water regions see shorter cell life because of calcium scaling on the cell plates.

Can I convert my existing chlorine pool to saltwater?

Yes, in most cases. The conversion adds a salt cell, a control unit, and an initial salt load. Your existing pump and filter usually work fine. Some equipment (certain ladders, light niches, metal hardware) may need salt-rated upgrades depending on age and condition. We handle these conversions regularly across all four of our locations.

Is saltwater bad for my pool deck or coping?

It can be, especially with natural stone or unsealed concrete. Sealing the decking annually and specifying salt-rated materials at install time keep wear in check. We have installed plenty of saltwater pools alongside natural stone coping that hold up fine with reasonable maintenance.

Talk to us before you decide

Whether you are building a new pool or thinking about converting an existing one to saltwater, we install and service both across our four locations. You will get a real conversation with a builder, not a sales pitch. Get in touch for a quote, or stop by the Greenville, Charleston, Arden, or Franklin showroom and ask us about the last saltwater pool we put in.

About the author: Stuart Lockhart is the General Manager of Hot Springs Pools & Spas, which has been building pools and serving pool and hot tub owners across Western North Carolina and Upstate and Lowcountry South Carolina since 1989. The company operates showrooms in Arden, Franklin, Greenville, and Charleston, with full builder and service teams at each location.

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