They're More Alike Than You Think
A salt chlorinator splits salt (sodium chloride) into chlorine. The water still needs pH, alkalinity, calcium and stabiliser in range. You still brush, vacuum, and clean the filter. The difference is how the chlorine gets into the water — not whether it's there.
Where Salt Wins
- Feel — many people find salt water softer on skin and eyes when chemistry is right.
- Day-to-day dosing — no weekly jug of liquid chlorine if the cell is healthy and sized correctly.
- Consistency — a good cell meters chlorine whenever the pump runs.
The catch: the cell scales up, especially with high pH and high calcium. It needs inspecting and acid-washing a few times a year. Cells typically last 3–7 years and they're not cheap to replace.
Where Traditional Chlorine Wins
- Lower upfront cost — no cell, no control box, no salt to start with.
- Simpler repairs — a dosing pump or a floater has fewer expensive parts.
- Better for some surfaces — salt is harder on some metals, stone waterline tiles, and older heaters. Not a deal-breaker, but worth knowing.
- Easier to shut down if the pool is closed for a long winter.
Cost Over 10 Years
Salt often costs more to install and to replace the cell, but less in weekly chlorine. Liquid chlorine costs more in chemicals and your time. Over a decade, for a typical 50,000 litre Brisbane pool, they often land in a similar range — the salt system wins if you look after the cell; it loses if you ignore it and replace it early.
The Professor's take: I like salt on well-maintained concrete and fibreglass pools in warm climates. I like liquid chlorine on older equipment, tight budgets, and pools that get neglected for months. Neither is "better" — the better pool is the one whose owner tests the water.
Which Should You Choose?
- Choose salt if you swim a lot, will check the cell, and want fewer weekly jugs.
- Choose chlorine if you want simpler gear, travel a lot in winter, or already have a good dosing setup.
- Already have salt? Don't rip it out. Learn the cell, keep pH in range, and keep a bottle of liquid chlorine on hand for heatwaves.
