Testing your pool's chlorine generator, also known as a salt cell, is essential to ensure it's producing sufficient chlorine to keep your pool water clean and safe. A properly functioning cell converts salt in your pool water into chlorine.
Key Testing Methods for Your Salt Cell
Several methods can help you determine if your chlorine generator is working correctly. These tests range from simple visual checks to verifying system parameters and the final chlorine output in your pool water.
1. Visual Inspection for Activity
One of the most straightforward ways to check if your salt cell is actively generating chlorine is through visual inspection while the pool pump and generator are running.
- Look for Bubbles: Carefully observe the inside of the salt cell casing. As shown in the video reference, look for the effect of bubbles and fizzing. This visual indicator, seeing the "bubbles being made," confirms that the electrochemical process converting salt (NaCl) into chlorine is occurring within the cell.
- Activity Level: The intensity of the bubbling and fizzing will vary depending on your chlorine generator's output setting and the flow rate of the water. More bubbles typically mean higher production.
If you see consistent bubbles and fizzing when the generator is on, it's a strong indication that the cell is functioning as designed.
2. Check Salt Level
The chlorine generator requires a specific range of salt concentration in the water to operate effectively.
- Verify Salt Concentration: Use reliable salt test strips or, ideally, take a water sample to your local pool store for a precise digital reading.
- Maintain Optimal Range: Refer to your generator's manual for the recommended salt level (usually between 2800 ppm and 4200 ppm, but this varies by model). Levels too low or too high can prevent the cell from producing chlorine or even damage it. Most systems have indicators for low or high salt.
3. Verify Power and Flow
The salt cell needs continuous power and adequate water flow to function.
- Check Control Panel: Examine the control panel of your chlorine generator system. Look for indicator lights that show the system is on, receiving power, and that there are no error codes related to flow, temperature, or cell issues.
- Ensure Water Flow: The pool pump must be running, and there must be sufficient water flowing through the cell. Most systems have a flow switch that will shut off chlorine production if flow is too low to prevent damage. Ensure filters are clean and pumps are operating correctly to maintain flow.
4. Inspect the Cell Condition
While not a direct test of current operation, the physical condition of the cell plates is vital for long-term function.
- Visual Inspection: Turn off the power and pump, then remove the cell (if easily accessible and you are comfortable doing so according to the manual). Look for excessive calcium scaling (white crusty deposits) on the metal plates.
- Cleaning: Heavy scaling insulates the plates and significantly reduces or stops chlorine production. Clean the cell according to the manufacturer's instructions, usually involving a mild acid wash solution.
5. Test Pool Water Chlorine Level
The ultimate test of your generator's effectiveness is the actual free chlorine level in your pool water.
- Use a Reliable Test Kit: Use a DPD test kit or test strips to measure the free chlorine in your pool water.
- Assess Production: Allow the chlorine generator to run at a sufficient output setting for several hours or even overnight. Test the chlorine level again. If the level has increased (or is being maintained at the desired level assuming demand isn't too high), the generator is producing chlorine.
Troubleshooting Common Issues
| Symptom | Potential Cause | Check/Solution |
|---|---|---|
| No bubbles/fizzing | Low salt, no flow, power issue, worn out cell, dirty cell | Check salt level, ensure pump is on/flow is adequate, check control panel, inspect/clean cell. |
| Low chlorine level | Low salt, low output setting, short run time, high demand, dirty cell | Check salt level, increase output/run time, test CYA, clean cell. |
| Error indicator light | Specific system fault (low salt, flow, temp, etc.) | Consult your system's manual for code interpretation and troubleshooting steps. |
By performing these checks, including the simple visual confirmation of bubbles and fizzing, you can effectively determine if your chlorine generator is working and producing chlorine for your pool.
