What Salt Level Should My Pool Run At? Maker Ranges Compared

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What salt level should my pool run at? Whatever your chlorinator's manual states. Published ranges run from 1,500–6,000 ppm on one maker's low-salt models to 5,000–7,000 ppm on another's, and one common unit targets about 4,000 ppm. To raise the level, add 10 kg of salt per 10,000 litres for each 1,000 ppm.

The short answer

Published ranges differ by unit. Poolrite 5,000–7,000 ppm; Waterco Hydrochlor 4,000–6,000; AstralPool Viron eQ about 4,000, never below 3,000; Davey EcoSalt2 3,000–6,000.
The salt formula: 10 kg per 10,000 litres per 1,000 ppm. Davey's table gives 50 kg for 1,000 ppm in 50,000 litres; AstralPool gives 200 kg to reach 4,000 ppm in 50,000 litres.
Narrow windows are less forgiving. From the top of its range, one unit can lose 21% of its salt before hitting the floor; others can lose 50% or more. Each 10% of water replaced by rain removes 10% of the salt.
Cold water changes the reading. Zodiac's EL manual needs about 6,000 ppm at 15°C but 4,100 ppm at 25°C for maximum efficiency.
Too much salt is fixed only by dilution. Salt is not consumed; AstralPool's eQ cuts out on overload above 10,000 ppm.

Published salt ranges by chlorinator manual, and how much of the salt each can lose before reaching its floor (read 30 September 2026)
Chlorinator (source)	Stated salt range or target	Floor the manual warns about	Salt you can lose from the top before the floor	Cold-water note in the same source
Poolrite chlorinators (maker's FAQ)	5,000–7,000 ppm	5,000 (bottom of range)	29%	Not stated
Poolrite magnesium mineral units (maker's FAQ)	3,000–4,000 ppm	3,000 (bottom of range)	25%	Not stated
Waterco Hydrochlor ST and MK3 (manuals)	4,000–6,000 ppm, optimum 5,500	4,000: below it, cell life and warranty may be affected	33%	Only an upper limit, 35°C
Davey EcoSalt (2015 manual)	4,500–6,000 ppm; above-ground models 2,500	Low salt ‘will damage the cell’	25%	Add salt to compensate for cold water
Davey EcoSalt2, standard models (2022 manual)	3,000–6,000 ppm	Add-salt alarm ~3,000; cut-out ~2,000	50%	Add-salt alarm below 15°C
Davey EcoSalt2, low-salt models (2022 manual)	1,500–6,000 ppm	Add-salt alarm ~1,500; cut-out ~1,000	75%	Add-salt alarm below 15°C
AstralPool Viron eQ (2024 manual)	About 4,000 ppm	Never below 3,000	25% (from the 4,000 target)	Low-salt light may show below 15°C; deactivate below 10°C
Zodiac EL series (2021 manual)	6,000 ppm required; 4,100 at 25°C; 4,000 at 27°C in its balance table	Below 3,000 may damage the cell and void the warranty	50% (from 6,000)	6,000 ppm needed at 15°C; deactivate below 10°C
Hayward AquaRite (US-market manual, 2010)	2,700–3,400 ppm, 3,200 optimal	2,700 (check-salt light below it); low chlorine below 2,400	21%	Stops generating below 50°F (10°C)

What salt level should my pool run at? The manual's range, not a number

The honest answer is the range printed in your chlorinator's manual, and the table above shows why no general figure can replace it. Across the manuals we read, stated ranges start as low as 1,500 ppm on Davey's low-salt EcoSalt2 models and reach 7,000 ppm on Poolrite's. NSW Health's public pool advisory document describes in-line salt chlorination at ‘approximately 3000 mg/L’, a general description rather than a setting for any unit. ppm and mg/L are the same thing here.

Our own saltwater vs chlorine and mineral vs saltwater pages summarised published Australian targets as roughly 2,700 to 6,000 ppm. Reading the manuals directly widens that. The 2,700–3,400 ppm range with a 3,200 optimum comes from a US-market manual. Australian makers publish from 1,500 ppm on low-salt models up to 7,000 ppm. Mineral units differ again: Poolrite's FAQ gives 3,000–4,000 ppm for its magnesium units.

The quotable version: the correct salt level for a pool is the range in its own chlorinator's manual, and the Australian manuals we read publish ranges from 1,500 to 7,000 ppm.

If you do not know your model, the name and model number are on the controller, and the manufacturer's site usually has the manual. Staying inside the range matters: Waterco, Davey and Zodiac all tie low salt to cell damage or warranty.

How much salt do I add to my pool? The calculation, end to end

The formula: kilograms of salt = litres of pool water × ppm increase ÷ 1,000,000. One ppm is one milligram per litre, so 10,000 litres raised by 1,000 ppm needs 10,000,000 mg, which is 10 kg.

Three manufacturers' own figures agree with it:

Davey's EcoSalt2 table: 50 kg raises 50,000 litres by 1,000 ppm; 200 kg raises it by 4,000 ppm.
AstralPool's eQ manual and Zodiac's guide: a pool of about 50,000 litres needs 200 kg to reach 4,000 ppm from fresh water. 50,000 × 4,000 ÷ 1,000,000 = 200.
Davey's EcoSalt manual: 45–60 kg per 10,000 litres for 4,500–6,000 ppm, and 25 kg per 25,000 litres when the level falls to the minimum. Both are 10 kg per 10,000 litres per 1,000 ppm.

Worked example. A 45,000 litre pool tests at 3,600 ppm. Its unit's range is 4,000–6,000 ppm, and you aim for the middle, 5,000 ppm. The increase needed is 1,400 ppm: 45,000 × 1,400 ÷ 1,000,000 = 63 kg. Salt comes in 20 kg bags, so three bags (60 kg) give 60 ÷ 45,000 × 1,000,000 = 1,333 ppm, for a result of about 4,933 ppm, inside the range.

Two things make the answer wrong. First, the pool volume: for a rectangle it is length × width × average depth in metres × 1,000, and the method is on how long a pool pump should run. Second, the starting reading: test it independently, because Davey says its own indicator is accurate only to within 500 ppm. AstralPool says salt can take up to a day to dissolve, so re-test the next day.

Ten kilograms of salt raises 10,000 litres of pool water by about 1,000 ppm, a figure the chlorinator makers' own tables confirm.

Why a narrow salt window is less forgiving of rain and backwashing

Salt leaves only with water: backwashing, splash-out, overflow and leaks. Rain dilutes it. If you replace 10% of the pool's water with fresh water, you remove 10% of the salt.

So the useful number is not a unit's target but how much of its salt it can lose before it reaches its floor. Starting from the top of each stated range, that is the fifth column of the table:

Hayward AquaRite, 3,400 to 2,700 ppm: 21%.
AstralPool Viron eQ, 4,000 to 3,000: 25%. Davey EcoSalt, 6,000 to 4,500: 25%.
Poolrite, 7,000 to 5,000: 29%. Waterco Hydrochlor, 6,000 to 4,000: 33%.
Davey EcoSalt2, 6,000 to 3,000: 50%; its low-salt models, 6,000 to 1,500: 75%.

Worked through as rain events. Take a 10m × 4m pool holding 50,000 litres. A 125mm downpour falling on its 40m² surface is 40 × 0.125 = 5 m³, or 5,000 litres. If it overflows, that replaces about 10% of the water. Each such event cuts the salt by 10%. A unit that can lose 21% stays in range through two of them: 3,400 × 0.9 × 0.9 = 2,754 ppm. The third takes it to 2,479, below the floor. A unit that can lose 50% stays in range through six.

The narrower a chlorinator's salt window, the sooner rain and backwashing push it below its floor, so a narrow-window unit needs testing after every heavy rain. When you are choosing a new chlorinator, the published range is a specification worth comparing. Pool equipment explained lists what else the chlorinator line of a quote should state.

Why does my salt reading drop in winter?

Often it has not dropped; the water has cooled. A chlorinator estimates salt from how much current passes through its cell, and cold water carries less current.

Zodiac's EL series manual: maximum efficiency needs about 6,000 ppm at 15°C but 4,100 ppm at 25°C.
AstralPool's eQ manual: the low-salt light may appear as the water cools below 15°C, and the cell should be deactivated below 10°C.
Davey's EcoSalt2: its add-salt alarm can be triggered by water below 15°C as well as by low salt.

A low-salt warning in water below 15°C is a temperature effect until an independent salt test says otherwise. Adding salt to clear it can leave you over the maximum when the water warms. The full cold-water and cell-fault checklist is on why a chlorinator stops making chlorine.

Can you put too much salt in a pool?

Yes, and it is slower to fix than too little. Salt is not consumed, so the only way down is to replace water. AstralPool's eQ troubleshooting table says the chlorinator cuts out on overload above 10,000 ppm, and to bring the level back to 4,000. Hayward's manual says high salt can shut its unit down and that salt starts to be tasted at about 3,500–4,000 ppm. Waterco's manuals warn that running above the maximum may affect cell life and warranty.

Replacing water has its own rules and costs: see draining a pool to the sewer in NSW, the WA rules and what refilling costs.

Add salt in measured amounts against a tested reading, never to make a warning light go out, because removing salt means replacing water. If you are specifying a chlorinator for a new pool or a replacement, ask each installer for the model's published salt range and compare pool quotes on the same unit.

Common questions

What should the salt level be in a saltwater pool in Australia?

The range in your chlorinator's manual. Waterco's Hydrochlor manual states 4,000 to 6,000 ppm with 5,500 optimum. Poolrite's FAQ gives 5,000 to 7,000 ppm. AstralPool's Viron eQ targets about 4,000. Davey's EcoSalt2 runs 3,000 to 6,000, or 1,500 to 6,000 on its low-salt models.

How much salt do I need for a 50,000 litre pool?

About 200 kg to reach 4,000 ppm from fresh water. Zodiac's chlorinator troubleshooting guide gives exactly that figure. The general formula is litres times ppm divided by 1,000,000, or 10 kg per 10,000 litres for each 1,000 ppm.

Why does my salt reading go down in winter?

Cold water conducts less, so the chlorinator reads it as lower salt. Zodiac's EL series manual needs about 6,000 ppm at 15°C against 4,100 ppm at 25°C. Test salt independently before adding any, so you do not overshoot when the water warms.

Do I need to add salt after rain?

Test first. Rain dilutes salt only if the pool overflows or you lower the level afterwards; each 10% of water replaced removes 10% of the salt. Davey's manuals say salt is lost through backwashing, splash-out, overflow and leaks, not evaporation.

What happens if the salt level is too high?

Output can stop and the water can taste salty. AstralPool's eQ cuts out on overload above 10,000 ppm, and Hayward's manual says salt starts to be tasted at about 3,500 to 4,000 ppm. The only fix is to replace some water with fresh.

Sources

General information only, current at 2026-09-30. Pool rules differ by state and by council, and penalty amounts are updated regularly. Confirm your own obligations with your council or a registered inspector before acting.