How to Convert a Pool to Saltwater

Converting to saltwater does not make your pool chlorine-free; it just makes the chlorine for you. You balance the water, add pool-grade salt to roughly 3,000 to 3,200 ppm, install a salt chlorine generator sized to your pool, set its output, and raise cyanuric acid to 60 to 80 ppm so the generated chlorine lasts. The result is steadier sanitation and gentler-feeling water. Here is exactly how to do the switch, with the calculators that get your salt and chemistry right.

Saltwater Conversion Gear

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Intex Krystal Clear Saltwater Chlorine System

Salt water generator for above-ground pools up to 15,000 gallons.

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briidea WiFi Salt Chlorine Generator

App-monitored generator with USA titanium salt cell for larger pools.

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Morton Pool Salt, 40 lb Bag

Pure granulated pool salt for saltwater generators, easy to dissolve.

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Aqua Joe Fast-Dissolving Pool Salt, 40 lb

Fine-grain pool and spa salt that dissolves quickly with less stirring.

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Step 1: Know your pool volume

Everything in a salt conversion depends on your gallons: how much salt to buy, which cell to size, and every chemical dose. Measure and confirm your volume with our pool volume calculator before you buy anything. Getting this number right prevents both an underpowered cell and a costly oversalting mistake.

Step 2: Balance the water first

Balance the pool as a normal chlorine pool before you add salt or run a cell. A salt generator works best, and the cell lasts longest, in well-balanced water.

• pH: 7.2 to 7.8. Salt cells tend to push pH up over time, so start near 7.4.
• Total alkalinity: 60 to 120 ppm to buffer that pH drift.
• Calcium hardness: 200 to 400 ppm. Very high calcium scales the cell plates.
• Free chlorine: a normal level so the water is sanitized before the cell takes over.

Set pH and alkalinity with our pH and alkalinity calculator, and use the full water balance guide if anything is off.

Step 3: Add salt to about 3,200 ppm

Test your current salt level first, since tap water and some chemicals already add a little. Then add pool-grade salt to reach your generator's target, commonly around 3,000 to 3,200 ppm. Our salt calculator takes your gallons and current reading and tells you how many pounds to add.

• Use only pure pool-grade salt, at least 99 percent sodium chloride, with no anti-caking or iodine additives.
• Broadcast the salt slowly across the pool with the pump running so it disperses.
• Brush it across the floor to help it dissolve and avoid a pile sitting on the surface.
• Let the pump run about 24 hours, then retest before adding more. It is easy to add salt and impossible to remove without dilution, so add conservatively.

Step 4: Install the salt cell and controller

Mount the salt chlorine generator after the filter and heater, as the last piece of equipment before the water returns to the pool, following the manufacturer instructions.

1. Cut in and plumb the cell into the return line per the manual, or attach the cell for an above-ground unit.
2. Mount the control box where it stays dry and out of direct weather, then wire it to power per the instructions or with an electrician.
3. Make sure the cell is rated for at least your pool's gallons. Sizing up gives margin so the cell can run at a lower percentage and last longer.
4. Confirm there are no leaks at the new fittings before powering on.

Step 5: Set the output and dial in chlorine

Power on the generator and start the output around the middle of its range, then adjust based on testing. The cell only makes chlorine while the pump runs, so your pump run time and the output percentage together set your daily chlorine production.

• Test free chlorine daily at first and nudge the output up or down to hold your target.
• Your free chlorine target depends on CYA, so set it with our chlorine calculator.
• Watch pH, which salt cells tend to raise, and bring it down with acid as needed.
• Many cells have a boost or super-chlorinate mode for shocking after heavy use.

Step 6: Raise CYA to 60 to 80 ppm

Salt pools run a higher stabilizer level than hand-dosed pools. Cyanuric acid of 60 to 80 ppm shields the steadily generated chlorine from sunlight, so the cell does not have to work as hard and lasts longer. Add stabilizer to reach that band and confirm it with our CYA calculator. Remember CYA only comes down by dilution, so add it gradually and retest.

Safety basics that still apply: a salt pool is a chlorine pool, so never mix pool chemicals, always add chemical to water and not water to chemical, run the pump while dosing, and retest before re-dosing. Store salt and chemicals dry, separated, and away from kids and pets.

Maintaining the salt pool

Once converted, upkeep is lighter but not zero. Test salt, free chlorine, pH, and CYA regularly, top off salt after heavy rain or backwashing, and inspect the cell for scale a few times a season, cleaning only when needed. For the full chemistry picture, read our saltwater pool chemistry guide, and if you are still deciding, our chlorine vs salt comparison weighs the trade-offs. With the cell set and CYA dialed in, a salt pool largely runs itself between water tests.