Symptoms
- Chlorine at zero while output shows high
- Water dulling, then tinting green
- Low-salt or check-cell lights lit
- Salt level by hand test different from the display
- White scale visible on the plates
The salt cell is honest equipment: given clean plates, true salinity and steady flow, it produces; denied any of the three, it stops, and its lights usually say which condition failed. Cape Coral’s contribution to the problem is water that scales plates faster than the national average, which is why the acid wash is a local rhythm rather than an emergency measure. Test the water independently before believing any single display, including the pool’s own. Flow direction matters more than owners expect: a cell installed or reinstalled against its marked flow arrow will sulk exactly like a failed one, so the arrow belongs on the visual checklist beside the plates, the salinity and the switch position.
Common Causes
| Cause | How likely | What a homeowner can check |
|---|---|---|
| Calcium scale insulating the plates | Very common locally | Open the cell and inspect the plate surfaces |
| Cell at end of rated life | Age-dependent | Find the install date or cell hours on the control unit |
| Actual salt level out of the working range | Common after heavy rain | Run an independent salt test, not the panel reading |
Questions and Answers
Can a salt pool need shock from a bottle?
Yes. During recovery or heavy load, supplemental chlorine is normal practice while the cell catches up. It does not mean the salt system failed.
Why does production drop in winter?
Most cells stop generating below roughly sixty degrees water temperature by design, which Southwest Florida brushes only in cold snaps. Low winter demand usually covers the gap.
Does more salt mean more chlorine?
No. Output is set by the control percentage and cell health. Salt far above range can trigger errors and tastes; the target is the manufacturer’s band.