Salt chlorine generators (SCGs) are the most popular pool sanitization system in Florida — and for good reason. They produce chlorine continuously from salt dissolved in the water, eliminating the need to buy, handle, and store liquid or tablet chlorine. But they require proper management to work well long-term.
How they work
Salt water (typically 2,700–3,200 ppm) passes through a chlorinator cell where low-voltage DC current runs between titanium plates coated with precious metals (ruthenium, iridium). Electrolysis splits sodium chloride (NaCl) into sodium hypochlorite — chlorine. The chlorine sanitizes the pool, then reverts back to salt. The salt is not consumed; it cycles.
Key specifications
- Salt level: Most systems target 2,700–3,400 ppm. Below 2,400 ppm the cell efficiency drops; above 3,500 ppm can damage the cell and pool equipment.
- Output percentage: Adjust based on chlorine demand. Florida pools typically need 50–80% in summer, 30–50% in cooler months.
- Cell inspection: Inspect plates every 90 days for calcium scale buildup. A scaled cell produces less chlorine even at 100% output.
- Cell lifespan: 3–7 years depending on water chemistry and use. High pH accelerates scale; low CYA means the cell works harder and wears faster.
The pH challenge
Salt cells produce chlorine at a very high local pH (8.5+) at the cell surface. This drives pool pH upward constantly — especially in pools with high TA or aggressive aeration. Salt pool owners typically need to add acid more frequently than tablet chlorine users. Keeping TA at 60–80 ppm (slightly lower than the 80–100 standard) helps slow pH rise.
Common misconceptions
- “Salt pools are chemical-free” — False. They still use chlorine, just produced on-site. You still need to manage pH, alkalinity, CYA, and calcium.
- “Salt cells don't need cleaning” — False. Scale buildup on cell plates is the #1 cause of premature cell failure.
- “You can set it and forget it” — False. Output must be adjusted seasonally and for bather load. Regular water testing is still required.
Top systems in Florida
Pentair IntelliChlor, Hayward AquaRite, and Jandy TruClear dominate the Florida market. All three are reliable with good local dealer support and available replacement cells.
A salt system is a convenience upgrade, not a chemistry bypass. The pools we see with the worst chemistry problems are often salt pools where owners assumed the system handled everything automatically. Test weekly. Adjust as needed.
Want a pro to handle this?
Our CPO-certified techs run this exact playbook on every weekly service visit.