The sales pitch for salt systems oversells the "low maintenance" angle a bit.
What you actually get is: you stop handling chlorine jugs. Everything else — brushing, baskets, filter, testing, balancing — is identical. And you pick up a couple of new jobs.
Still a good trade. Just not the hands-off pool some people expect. Cells are consumable either way, so budget for one every few years and see our salt cell picks for what fits your system.
Key takeaways
- Everything in a normal weekly routine still applies. Salt doesn't remove work, it removes chlorine handling.
- pH climbing is inherent to salt pools. Budget acid accordingly and run alkalinity at 70-80 ppm.
- Test free chlorine, not the cell's output percentage. The panel doesn't know what's in the water.
- Turning output up to fix low chlorine wears the cell out. More run time is usually the right answer.
- Cells stop producing in cold water, at a threshold that differs by brand — 50°F Hayward, 52°F Pentair, 60°F Jandy. Plan for liquid chlorine in the shoulder season.
What stays exactly the same
Everything in the standard weekly routine:
- Empty both baskets
- Skim the surface
- Brush walls, steps and the waterline
- Test free chlorine and pH twice a week
- Watch filter pressure against your baseline
- Clean the filter at 8–10 psi over
Salt changes nothing about any of that. If anything, brushing matters slightly more, because the steadier low-level chlorine is less likely to punch through a developing biofilm than a big weekly dose would.
Go deeperThe weekly routine, printableThe base checklist every pool needs, salt or not.The three things that are different
1. pH climbs, constantly
This is the defining characteristic of owning a salt pool.
Electrolysis at the cell produces hydrogen gas, which aerates the water at the return. Aeration drives off carbon dioxide. pH goes up. Every day.
What to do about it:
- Run total alkalinity at 70–80 ppm rather than 100–120. Less carbonate means less CO₂ to lose, so pH climbs slower.
- Think about borates at 30–50 ppm if it still climbs. They're a second buffer that can't gas off. They also only come out when you replace water, so decide before you add them.
- Expect to add acid every one to three weeks depending on your pool.
- Consider an acid feeder or a pH controller if you're doing it constantly. On a large pool it's a genuine quality-of-life upgrade.
- Don't fight it with soda ash. You'll just be adding both.
2. Salt level
Check monthly. Target is usually 2,700–3,400 ppm — check your specific unit, because manufacturers differ.
Salt doesn't evaporate. You lose it to:
- Splash-out
- Backwashing
- Rain overflow
- Partial drains
- Filter cleaning
So on a stable pool it barely moves for months. After a wet season or a lot of backwashing, top it up.
Adding salt: broadcast over the deep end with the pump running, brush it around to help it dissolve, and give it 24 hours before you test again. Don't dump it in the skimmer — undissolved salt through the cell isn't good for it.
Don't chase the panel reading. The unit's salt display is a calculated estimate from conductivity and it drifts, particularly as the cell ages. Test with strips or take a sample to a pool store before adding anything based on a panel number.
3. The cell
Look at it every few months. Power off, unplug, remove, and shine a light through the plates. Dark gray is healthy. White crust is scale.
Clean scale properly, which mostly means briefly — over-cleaning strips the plate coating and shortens the cell's life more than the scale would have. The procedure and the timings are with the rest of the diagnosis.
Prevent scale instead. It's a chemistry problem — high pH plus high calcium. Keep pH in range and hardness sensible and many cells need nothing but an occasional rinse.
Track the install date. When output drops and cleaning doesn't restore it, it's done. Three to seven years is normal.
The mistake that kills cells early
Free chlorine reads low, so you turn the output percentage up. It's the obvious move and it's usually wrong — running a cell at 100% wears it out substantially faster than running at 50%, and the dial is almost never the actual problem.
If you find yourself constantly at high output, that is a symptom worth diagnosing rather than compensating for. Working out what is really short — pump hours, stabilizer, a scaled cell or one that was undersized from the start — is the difference between a fix and a cell that dies two years early.
Testing on a salt pool
Test free chlorine with a kit, not the panel. The control panel knows what it's producing. It has no idea what's actually in your water — that depends on demand, sunlight, bather load and CYA. Test the water. If it reads high, look at the output setting and your pump hours first; lowering chlorine on a salt pool walks through both.
Test CYA monthly and keep it at 60–80.
Test salt monthly, ideally with strips or at a pool store rather than trusting the panel. When it reads low, pool salt is a couple of bags a season on most pools.
Test calcium hardness monthly. Scale on the cell starts as scale in the water.
Seasonal notes
Cold water. Cells cut production as the water cools and stop entirely at a threshold the manufacturer sets — Hayward below 50°F, Pentair below 52, and Jandy naming 60°F as a warranty condition rather than a cutoff. That's a protective feature, not a fault. In shoulder seasons you'll need liquid chlorine, and in a mild-winter climate where you don't close, plan for it.
Closing. Remove the cell, clean it, and store it indoors. Freezing water inside a cell cracks the housing, and that's the whole unit.
Opening. Reinstall, check the salt level after winter dilution from rain and snowmelt, and don't be surprised if you need a couple of bags.
The annual check nobody does
Fifteen minutes once a year, and it catches most of what turns into a bill.
Pull the cell and look at it in daylight, even when nothing is wrong. You are establishing what your plates look like healthy, so that next time you have something to compare against. Photograph it.
Check the unions either side for weeping. Salt water finds its way out of a marginal union eventually, and the drip lands on whatever is below it — usually the pad, sometimes a control box.
Inspect the return fittings and any metal in the splash zone. Handrail anchors, ladder sockets, light rings. Salt concentrates where splash-out evaporates, and this is where corrosion shows up first.
Look at the heat exchanger's headers if you have a heater. Staining or a green tint around the fittings is worth a technician's opinion before it becomes a leak.
Rinse the coping and the deck in the splash zone, and make it a habit through the season if you have natural stone.
None of that is difficult. It is simply the maintenance that a salt pool asks for and an ordinary chlorine pool does not.
Shocking a salt pool
Use liquid chlorine.
Most systems have a boost or superchlorinate mode that runs the cell at 100% for a day or so. It's slow, it's hard on the cell, and on a real algae problem it usually can't reach the level you need anyway.
Get the level up fast with liquid, hold it there, then let the cell take over maintenance once you're back in range. That's what the cell is good at.
Go deeperWork out the top-upEnter your volume and current reading and it does the bags for you. Go deeperThinking about converting?What it costs installed, and why the payback lands around the life of the first cell.Frequently asked questions
Do saltwater pools need chemicals?
Yes. You'll add acid regularly because pH climbs, salt occasionally to top up, cyanuric acid to protect the chlorine the cell makes, and calcium or alkalinity adjusters as needed. What you stop buying is weekly chlorine.
How often should I check salt level?
Monthly, and after anything that removes water — heavy backwashing, a big rain overflow, a partial drain, or a summer of splash-out. Salt doesn't evaporate, so a stable pool holds its level for months at a time.
Why is my salt cell not producing chlorine?
Common causes in order: water below the cell's cold-water cutoff, which is 50°F on a Hayward and 60°F on a Jandy, salt level out of range, scale on the plates, low flow tripping the sensor, or a cell at the end of its life. Check water temperature and salt first — those two account for most of these calls.
Can I use liquid chlorine in a saltwater pool?
Absolutely, and you should when you need it. Liquid chlorine is the right tool for shocking, for clearing algae, and for cold months when the cell isn't producing. Running the cell at 100% to try to shock a pool wears it out and usually doesn't reach the level you need anyway.
How do I shock a saltwater pool?
With liquid chlorine, same as any pool — shock to about 40% of your CYA reading. Most salt systems have a boost or superchlorinate mode, but it's slow and hard on the cell. Use liquid to get the level up fast, then let the cell maintain it.
