Why salt pools behave differently in the desert
Salt chlorine generators (SWGs) make chlorine on demand by passing low-voltage current through salty water across a cell. In Las Vegas, two things stress that cell harder than almost anywhere else: extreme heat that drives long runtimes, and very hard tap water that loves to plate calcium onto the cell plates.
Get the chemistry right and a quality cell lasts 5–7 years here. Get it wrong and you'll be replacing a $700–$1,000 cell every 2–3 years.
The salt-pool number targets for Vegas
Slightly different from a tab-chlorinated pool — the salt cell needs specific conditions to make chlorine efficiently:
- Salt: 2,700–3,400 ppm (check your cell's manual — Pentair, Hayward, and Jandy differ)
- Free chlorine: 3–5 ppm in summer, 1–3 ppm in winter
- pH: 7.2–7.6 — salt cells naturally drift pH up, so don't chase it daily
- Total alkalinity: 70–90 ppm (lower than a non-salt pool to offset pH drift)
- Calcium hardness: 200–400 ppm — above 400 and your cell scales fast
- CYA (stabilizer): 60–80 ppm — higher than a tab pool, to protect SWG-made chlorine from UV
Inspect and clean the cell every 3 months
Pull the cell every quarter and look down the plates with a flashlight. Clean plates look like clean metal grates. If you see white crusty buildup between or on the plates, that's calcium scale — and it's stealing your chlorine output right now.
Light scale: hose it off with a strong jet. Moderate scale: soak in a 4:1 water-to-muriatic-acid solution for 5–10 minutes (never longer, never reverse the ratio), rinse thoroughly, reinstall. Heavy scale every quarter means your water chemistry needs adjustment, not just more acid baths.
The mistakes that kill salt cells in Vegas
Almost every premature cell failure we see traces back to one of these:
- Running the cell at 100% output 24/7 instead of dialing it to actual demand — heat plus full duty cycle ages plates fast
- Ignoring high pH — salt pools naturally rise, and high pH plus hard water = guaranteed scale
- Acid-bathing the cell every month — repeated acid exposure thins the ruthenium coating and shortens cell life
- Letting calcium hardness climb past 500 ppm because top-off water keeps adding it — partial drain every 2–3 years
- Forgetting to lower the SWG output in winter — the cell still runs but produces chlorine the cold water can't use, wasting plate life
Winter settings save the cell
When water drops below 60°F, most salt cells slow or stop chlorine production automatically — but the cell still energizes if the pump is running. Drop the SWG output to 10–20% from November through February, and consider a 'winter mode' if your controller has one.
If you go a full week with water under 50°F, switch off the cell entirely and dose with liquid chlorine until things warm back up. You'll add years to the cell.
When to call a pro
If your salt reading is in range but the cell flashes 'low salt' or 'check cell,' that's almost always scale or end-of-life — not a salt problem. A pro can verify with an amperage test in 10 minutes.
Same goes for stubborn algae in a salt pool: if you've held salt, pH, and CYA in spec for two weeks and the pool still won't clear, the issue is the cell's actual output, not your chemistry. Worth a service call before you spend another $200 on shock.
Want us to handle it?
We'll diagnose, dose, and dial in your pool — so you don't have to remember any of this.
Get a free quote