Quick answer: A salt chlorinator converts dissolved salt in your pool water into chlorine automatically through electrolysis — so you don't need to buy or add chlorine manually. For most Australian pool owners who swim regularly, switching is worth it: lower ongoing chemical costs, more consistent water quality, and far less hands-on maintenance. It's not the right call for every pool, but it's the most practical sanitisation option for the majority of Australian residential pools.
Here's what to know before you make the switch.
What Is a Salt Chlorinator?
A salt chlorinator converts dissolved salt in your pool water into chlorine through electrolysis. Water passes over a cell, chlorine is produced on the spot, and your pool stays sanitised without you having to add anything.
Worth clearing up straight away: saltwater pools are not chlorine-free. They still use chlorine to keep the water safe. The difference is the system makes it for you. Salt concentration sits at around a tenth of seawater, so you won't taste it.
Salt Chlorinator vs Liquid Chlorine
The biggest shift when you switch is convenience. No more chlorine runs, no heavy containers, no coming back from a long weekend to find your pool has turned because you forgot to dose it before you left.
| Feature | Salt Chlorinator | Liquid Chlorine |
|---|---|---|
| Chlorine source | Made on-site from dissolved salt | Purchased and added manually |
| Ongoing effort | Low, mostly automated | Regular dosing required |
| Upfront cost | Higher | Lower |
| Long-term running cost | Lower | Ongoing chemical spend |
| pH management | Automatic on modern units | Manual |
| Best for | Owners who want a low-maintenance pool | Pools used occasionally or tight upfront budgets |
What Else Changes When You Switch?
Beyond not buying chlorine, there are a few other things worth knowing.
- Salt levels basically look after themselves. Salt is not consumed during chlorine production. It only gets diluted by heavy rain or backwashing. Most systems work across a range of concentrations, so you rarely need to adjust anything.
- The water feels noticeably better. Many chlorinators are compatible with mineral salts like magnesium chloride. Adding magnesium softens the water, which is easier on skin and eyes — especially if you've got kids in the pool every day over summer.
- Modern units handle pH too. Some chlorinators monitor and adjust both chlorine and pH automatically. That's two jobs handled in one unit and one less thing to test and chase manually.
Is the Conversion Process Complicated?
Not really. You add the right amount of pool salt to hit the target concentration, install the cell and controller, and the system takes over from there. Most installs are done in a few hours.
If you've been running liquid chlorine, your pool already has some salt in it. Liquid chlorine is derived from salt, so there's already residue in the water. You'll likely need less top-up salt than you expect.
Is It Worth Switching?
For most pool owners who swim regularly through the Australian summer, yes. Salt chlorination is the most practical sanitisation option for the majority of Australian residential pools.
If your pool only gets used occasionally and your current routine is working fine, there's less urgency. But if you're spending real time managing chemicals, the switch pays for itself quickly.
Madimack InverCHLOR 40 Intelligent Salt and Mineral Pool Chlorinator
Frequently Asked Questions
Are saltwater pools really chlorine-free?
No. Salt chlorinators produce chlorine through electrolysis, and that's what sanitises the water. The difference is the chlorine is made on-site rather than added manually. Levels in a salt pool are usually lower and more consistent than a traditionally dosed pool, but chlorine is still doing the work.
How often do you need to top up the salt?
Salt only leaves the pool through dilution — mainly from heavy rain or backwashing. For most Australian pools you're topping up once or twice a season at most. Your chlorinator will flag when levels drop too low.
How long does a salt cell last?
Most salt cells last between three and seven years. The biggest factor is water chemistry — keep your calcium hardness and pH balanced and you'll get a lot more life out of it.
What size salt chlorinator do I need?
Salt chlorinators are sized by their chlorine output in grams per hour. As a guide, you need roughly 1–2g of chlorine output per hour for every 10,000 litres of pool water. A 50,000-litre pool typically needs a unit rated at 25–35g/hr. See our salt chlorinator sizing guide for a full breakdown.
Can I switch from liquid chlorine to a salt chlorinator myself?
The salt top-up and basic setup is straightforward, but the electrical installation of the controller should be done by a licensed electrician in most Australian states. The cell itself typically connects to your existing plumbing with minimal modification.