Most people arrive at this question the same way: the salt cell has died, the quote to replace it is uncomfortable, and switching back to tablets suddenly looks appealing. Others are selling the house, or have inherited a system they never wanted, or are simply tired of chasing pH every week.
The good news is that converting back is genuinely easy — far easier than converting to salt in the first place. The catch is the salt itself, which does not go anywhere just because you switched the machine off. This guide covers the honest decision first, then the conversion, then what to do about the salt. If you are still weighing it up, the pool salt calculator and our salt water pool cost breakdown will help you put numbers on both sides.
Should you convert back? The honest answer
Plenty of guides on this topic are written by people who want to sell you either a cell or a case of tablets. Here is the balanced version.
The last row matters more than any other. Converting to tablets does not solve algae, cloudy water, or a pool that cannot hold chlorine. Those problems are about stabiliser, pH, filtration and run time, and they behave the same way whichever sanitiser you use. Work through how to increase free chlorine and why salt pools go cloudy before you decide the system is the problem.
Four things worth knowing before you commit
You are trading automation for a chore
A salt cell makes chlorine every day whether you are home or not. After conversion, someone has to buy, carry, store and dose chlorine all season, and remember to do it before a holiday rather than after. That is the real cost, and it does not appear on any price comparison.
Chemical storage comes back
Tablets, shock and acid in a hot shed, with the handling and safety considerations that go with them. One of the genuine advantages of a salt pool is that the sanitiser is made on demand rather than stockpiled.
The water will feel different
Whether that matters is personal, but it is real. Salt pools feel softer and are gentler on eyes because chlorine is delivered continuously at low concentration rather than in peaks. Some of that difference persists while the salt remains, then fades.
The pH problem is usually fixable
If weekly acid dosing is what is driving you out, the cause is almost always total alkalinity sitting too high for a salt pool. Dropping it to 70–80 ppm typically stretches the interval to three or four weeks. How to lower pH in a salt pool covers it.
None of this is an argument against converting. It is an argument for converting deliberately rather than in frustration on the day a cell fails. If you have read this and still want to switch, the rest of the guide is the how.
What actually changes (less hardware than you think)
A salt water pool is a chlorine pool. That is the single most useful thing to understand here. The plumbing, pump, filter, heater, returns, skimmer and shell are all identical to any other pool. The only difference is where the chlorine comes from.
| Component | Salt pool | After conversion | Work needed |
|---|---|---|---|
| Pump | Unchanged | Unchanged | None |
| Filter | Unchanged | Unchanged | None |
| Heater | Unchanged | Unchanged | None |
| Plumbing | Cell plumbed in line after the filter | Bypass pipe in its place | 30 minutes |
| Salt cell | Generates chlorine | Removed and stored | Unions off |
| Control box | Runs the cell | Powered down, can stay mounted | Switch off, isolate |
| Chlorine source | Made on site | Tablets, liquid or feeder | Buy and dose |
| Salt in water | ~3,000 ppm | Falls slowly over seasons | Nothing, or partial drains |
Because so little changes, a conversion is realistically a Saturday morning job for anyone comfortable with a union wrench, and closer to an hour if your cell came with the dummy pipe that most manufacturers supply for winter storage.
The conversion, step by step
Free chlorine, combined chlorine, pH, total alkalinity, calcium hardness, cyanuric acid and salt. You need this baseline because your targets are about to change, and because the stabiliser number decides which sanitiser you can safely use.
Off in software first, then isolate the power. This prevents anyone energising the cell circuit once the cell is out and there is no water flowing through it.
The moment the cell stops, your residual starts falling and nothing is replacing it. Add liquid chlorine that same evening, or get a feeder running, so the pool never drops below a safe level. A gap of even three or four warm days is enough to start an algae bloom.
Undo both unions, slide the cell out, disconnect the cell cord and the flow switch lead. Rinse the cell, drain it fully and set it aside — do not bin it yet.
Most cells ship with a straight dummy pipe of the same length for winter storage; fit that. If you do not have one, cut a length of PVC to match the run and join it with couplings and solvent cement, or use two union halves and a nipple so the section stays removable. Leaving a removable joint is worth the small extra effort if there is any chance you will switch back.
An off-line erosion feeder plumbs in after the filter and heater, on the return line, with a check valve to protect the heater. Set the dial low to begin with and adjust. If you would rather not plumb anything, a floating dispenser works fine on a smaller pool.
Every union and every fresh glue joint. Run it for a few minutes and look, then look again after an hour.
Your targets change now that nothing is driving pH upward. Details in the rebalancing section below.
Test twice a week, dose accordingly, shock when combined chlorine rises. The system no longer covers for you, and the first month is where most converted pools go green.
Never put chlorine tablets in the skimmer. It is a common shortcut and it sends highly acidic, concentrated chlorine straight through your pump, filter and heater every time the pump starts. It corrodes pump seals and heater exchangers, and it destroys the very equipment you were trying to save money on.
The salt problem: it does not go away when you switch the machine off
This is the part people are least prepared for. There is no chemical that removes sodium chloride from pool water. It does not evaporate, does not break down, and is not consumed by anything. Switching off the generator leaves you with a pool that still contains roughly 3,000 ppm of salt.
In practice that is fine. At that concentration the water is about a tenth as salty as seawater, is barely detectable to taste for most people, and is harmless to swim in. The question is only whether you want it gone, and how fast.
Option one: let it dilute naturally
The easy answer, and the right one for most pools. Salt leaves only with water, so every backwash, splash-out, filter clean, partial drain and rain overflow takes a share of it with it. Meanwhile the water you add back is fresh.
| Filter type and habits | Rough annual salt loss | Time to fall below ~1,000 ppm |
|---|---|---|
| Sand filter, weekly backwash | Substantial | 1 – 2 seasons |
| DE filter, regular backwash | Moderate to substantial | 1 – 2 seasons |
| Cartridge filter, low splash-out | Low | 3+ seasons |
| Mesh cover, wet winters | Higher — rain overflow dilutes | 1 – 2 seasons |
| Dry climate, solid cover | Very low | Several seasons |
Option two: dilute deliberately
If you want the salt down quickly — because of a specific corrosion concern, or because you are handing the pool over — the only method is replacing water. Drain a portion, refill, retest, repeat. The maths is straightforward: removing and replacing a given percentage of the volume removes the same percentage of the salt.
New ppm = current ppm × (1 − fraction of water replaced)So replacing a third of a pool sitting at 3,200 ppm brings it to roughly 2,130 ppm. Two rounds of a third gets you to about 1,420 ppm. The full method, including how much you can safely take out at once, is in how to lower the salt level in a pool.
Never fully drain an inground pool to get the salt out. Groundwater pressure outside the shell can lift a fiberglass or vinyl pool and crack a concrete one. Partial drains only, and never on a high water table or straight after heavy rain.
Draining removes everything, not just salt. Stabiliser, alkalinity and calcium all go with the water and have to be rebuilt. Factor the cost of replacing those into the decision before you reach for a hose.
Choosing your new sanitiser
The stabiliser reading you wrote down in step one decides this, and it catches a lot of people out. Salt pools deliberately run cyanuric acid at 60–80 ppm because the cell delivers chlorine slowly and needs the sun protection. Trichlor tablets add more cyanuric acid every single time they dissolve.
| Product | Adds | Convenience | Best for | Watch out for |
|---|---|---|---|---|
| Liquid chlorine | Nothing lasting | Low — dose every few days | Pools already high in stabiliser | Heavy jugs, short shelf life, raises pH slightly |
| Trichlor tablets | Cyanuric acid, and acidic | High — feeder does the work | Pools with stabiliser under ~50 ppm | Stabiliser creep; never in the skimmer |
| Cal-hypo | Calcium | Medium — granular | Soft water areas | Raises hardness; scale risk |
| Dichlor | Cyanuric acid | Medium — granular, dissolves fast | Occasional shock in low-CYA pools | Same stabiliser creep as trichlor |
| Liquid feeder / peristaltic pump | Nothing lasting | High — automated | Owners who want automation without salt | Upfront cost; tank refills |
If your stabiliser is already at 70–80 ppm, do not go straight onto tablets. You will be well past 100 ppm within a season, chlorine will become sluggish, and the only fix is a partial drain. Either use liquid chlorine until dilution brings stabiliser down, or plan a water change as part of the conversion.
There is a pleasing irony here: if you convert and then dilute to bring stabiliser down for tablets, you are also removing the salt at the same time. One water change serves both goals.
Rebalancing for a chlorine pool
Your targets shift once the cell is off, because the force that was constantly pushing pH upward has gone.
| Parameter | Was (salt pool) | Now (chlorine pool) | Why it changes |
|---|---|---|---|
| Total alkalinity | 70 – 80 ppm | 80 – 120 ppm | You now want a bigger buffer, not a smaller one |
| pH | 7.2 – 7.6, drifting up | 7.2 – 7.8, drifting down on tablets | Trichlor is acidic, so the drift reverses |
| Cyanuric acid | 60 – 80 ppm | 30 – 50 ppm | Chlorine arrives in doses, not continuously |
| Free chlorine | Scaled to high CYA | 1 – 3 ppm at 30–50 CYA | Lower stabiliser means lower target works |
| Calcium hardness | 200 – 350 ppm | 200 – 400 ppm | No cell plates to scale, so more headroom |
| Salt | 2,700 – 3,400 ppm | Whatever it falls to | No longer a target, just a residual |
Watch pH in the opposite direction now. If you go onto trichlor tablets, pH and alkalinity will start falling rather than rising. Low pH is more damaging than high pH — it etches plaster and corrodes metal. Expect to be adding sodium bicarbonate and soda ash where you used to add acid.
Does converting back actually save money?
Less than most people assume. The salt system’s big cost is the cell, replaced every three to seven years. The chlorine pool’s big cost is sanitiser, spread evenly across every season. They are different shapes, similar totals.
| Cost item | Salt pool | Chlorine pool |
|---|---|---|
| Conversion / setup | — | Bypass pipe, plus a feeder if used |
| Sanitiser per season | Very low — 1–3 bags of salt | Steady annual spend on tablets or liquid |
| Major replacement | Cell every 3–7 years | Feeder occasionally; no major item |
| Acid / balancing | Regular acid to counter pH rise | Bicarb and soda ash to counter pH fall |
| Electricity | Small addition for the cell | None beyond the pump |
| Your time | Low — mostly automated | Higher — regular manual dosing |
| Storage and handling | Bags of salt | Tablets, shock, acid, bicarb |
Over ten years the two totals usually land closer together than either camp likes to admit. Convert because you want manual control, because the controller has failed, or because you are moving on — not because you expect a large saving. The full numbers are in how much a salt water pool costs and the head-to-head comparison lives in salt versus chlorine.
What to do with the cell and control box
If the cell still has life, sell it. A working cell with a couple of seasons left has real resale value, and there is a steady market from owners whose own cell has failed. Clean it first — how to clean a pool salt cell — and be honest about its age.
If it is dead, check for a warranty or a core credit. Some manufacturers and retailers offer a credit against a new cell when you return the old one. Even a dead cell is not always worthless.
Leave the control box mounted and wired. It costs nothing to leave in place, and it is the expensive half of the system if you ever want to go back. Switch it off, isolate it at the breaker and leave it.
Keep the flow switch and the cell cord. Small parts that are annoying and surprisingly costly to source separately later.
Store the cell dry, indoors and upright. The same rules as winter storage: drain it fully, let it dry, keep it above freezing, do not stack anything on it. See winterizing a salt water pool.
Do not cut out the plumbing you cannot easily restore. If you glue a permanent length of pipe in place and remove the unions entirely, going back means a plumber. Keep at least one removable joint.
If you change your mind and want to go back
It happens, most often after a summer of hauling jugs. Going back is straightforward, and how much it costs depends entirely on how long you waited.
Within a season
The salt is probably still in the water, and the controller and plumbing are still there. You may only need a new cell. Test salt, top up the shortfall, refit and switch on.
After a few years
Salt will have diluted well below target, so budget for a cell plus enough bags to rebuild the level — typically six to ten 40 lb bags for an average pool. Work out the exact figure with the pool salt calculator.
If you removed everything
Controller gone, plumbing glued solid, breaker reused — now it is a full conversion again. The process is set out in converting a chlorine pool to salt water.
Plenty of converted pools still sit at 2,000 ppm or more a year later. Measure it, then run the number through the pool salt calculator — the top-up is often much smaller than expected. Testing methods are in how to test salt level in a pool.
Mistakes that make a conversion go wrong
Switching the cell off and not starting chlorine immediately. The single most common failure. The residual falls over three or four days and the pool is green before anyone has bought tablets. Dose the same evening you switch it off.
Going straight onto trichlor tablets with 80 ppm stabiliser. You will be over 100 ppm within a season and back to a partial drain. Check cyanuric acid first and use liquid chlorine until it comes down.
Putting tablets in the skimmer. Corrodes the pump, filter and heater. Use an off-line feeder or a floater.
Draining the pool to remove salt. Expensive, wasteful, and genuinely risky for the shell. Let it dilute, or do controlled partial changes.
Leaving alkalinity at 70 ppm. That figure was correct for a salt pool being pushed upward. On tablets you need the bigger buffer or pH will crash.
Throwing away the control box. It is the expensive half of the system, it costs nothing to leave mounted, and removing it is the one step that makes going back genuinely expensive.
Assuming the water problems will disappear. Algae, cloudiness and chlorine demand come from chemistry, filtration and run time — not from how the chlorine is produced.
Frequently asked questions
How do I convert a salt water pool back to chlorine?
Switch the generator off and isolate the power, start dosing chlorine manually straight away, remove the cell and fit a bypass pipe, add a feeder if you plan to use tablets, and rebalance alkalinity and stabiliser for a traditional pool. The salt stays in the water and dilutes out over time.
Do I have to drain the pool?
No. Salt at around 3,000 ppm is harmless to swim in and to a properly built pool, so you can leave it and let it fall naturally. Drain only if you need it gone quickly, or if you also need to bring stabiliser down for tablet use.
How long does the salt stay in the water?
One to three seasons for most pools. Salt only leaves with water, so backwashing, splash-out, partial drains and rain overflow are what remove it. A sand filter backwashed weekly clears it far faster than a cartridge filter.
Is a chlorine pool cheaper to run than a salt pool?
Not by as much as people expect. Salt pools cost more in cell replacements but almost nothing in sanitiser; chlorine pools have no cell but a steady annual spend on tablets and shock. Over a decade the totals often land within a few hundred dollars of each other.
Can I convert back to salt later?
Yes, and it is easy if you left the controller mounted and kept a removable joint in the plumbing. Within a season you may only need a cell. After a few years you will need salt as well — work out how much with the pool salt calculator.
What chlorine should I use after converting?
Liquid chlorine if your stabiliser is already high, which it usually is after a salt pool. Trichlor tablets in a feeder are more convenient but add cyanuric acid every time. Check your cyanuric acid reading before you choose.
Will the leftover salt damage my equipment?
It should not, if the equipment was suitable for a salt pool to begin with. Worth checking: natural stone coping, untreated metal fittings, ladder and rail anchors, and some heater components. Keeping pH in range matters more for corrosion than the salt does.
Should I convert or just replace the cell?
If only the cell has failed and everything else works, replacing it is usually better value than years of tablets. Converting makes more sense when the controller has failed too, when you are selling the property, or when you genuinely prefer dosing by hand. See how long a pool salt cell lasts.
Can I still taste the salt after converting?
Possibly at first. Most people notice salt somewhere around 3,000 ppm only faintly, and the taste fades as the level dilutes. It is well below the threshold where it would be unpleasant.
Do I need a new filter or pump?
No. Nothing about the pump, filter, plumbing or heater is specific to salt. The only piece being removed is the cell itself.
Can I leave the salt cell plumbed in but switched off?
You can, and in a non-freezing climate it does no harm. But a cell left in flowing water for years will accumulate scale and deteriorate anyway, so if you are keeping it for resale or a future switch back, take it out and store it dry.
Will my water feel different?
Gradually. The softer feel of salt water comes partly from the dissolved salt and partly from steady low-concentration chlorine rather than dosing peaks. Both change as you convert, so expect the water to feel a little more like a conventional pool over the following season.
Sources and further reading
Healthy Swimming — disinfection targets that apply whichever chlorine source you use.
Pesticide registration — regulatory background on chlorine sanitiser products sold for pools.
Saline water — salinity classifications putting pool salt levels in context.
Owner’s manuals — cell removal, bypass fitting and controller isolation procedures.
The short version
Converting back is a morning’s work: switch the generator off, start dosing chlorine the same day, pull the cell, fit a bypass, and rebalance alkalinity and stabiliser for a conventional pool. The salt stays behind and dilutes over one to three seasons, which is fine because at 3,000 ppm it does no harm. Keep the controller and one removable joint so going back is cheap if you change your mind.
Before you commit, check the numbers: what a salt water pool really costs, salt versus chlorine head to head and whether salt pools are actually easier to maintain. If the weekly acid routine is what is driving the decision, try fixing the pH drift first — it is usually an alkalinity problem, not a system problem.
Still on salt for now? The pool salt calculator, cleaning the cell, restoring free chlorine and the weekly routine will keep it running.
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