The primary method for lowering the salt level in a saltwater pool is to dilute the water by partially draining the pool and refilling it with fresh water.
Here's a more detailed explanation:
Why Dilution is Necessary
Unlike other pool chemicals that dissipate or break down over time, salt in a saltwater pool doesn't go anywhere unless the water itself leaves the pool. Salt doesn't evaporate; only the water does. Therefore, the salt concentration increases as water evaporates and is topped off with fresh water.
The Process of Lowering Salt Levels
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Test Your Water: Use a reliable salt test kit or take a sample to your local pool supply store for testing. This will give you an accurate salt reading (measured in parts per million, or ppm).
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Determine the Target Salt Level: Check your salt chlorine generator's (also known as a salt water chlorinator) manual for the recommended salt level range. Generally, this range is between 2700-3400 ppm, but it can vary. Aim for the lower end of the recommended range if your salt level is significantly high.
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Calculate the Amount of Water to Drain: This is the trickiest part and depends on several factors:
- Current Salt Level (ppm): The salt concentration that your pool water has now.
- Target Salt Level (ppm): The ideal concentration for your salt chlorinator.
- Pool Volume (gallons): The total amount of water in your pool.
While precise calculations require formulas, a general approach is to estimate the percentage that your current salt level exceeds your target level and then drain that percentage of your pool volume. Consult a pool professional for the most accurate calculation.
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Drain the Pool: Use a submersible pump to drain the appropriate amount of water from your pool. Ensure you drain the water to a location that can handle the volume without causing damage or flooding. Consider local regulations about draining pool water into storm drains.
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Refill with Fresh Water: Refill the pool with fresh water until it reaches its normal level.
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Re-test and Adjust: After the pool water has circulated for a few hours (ideally 24 hours), re-test the salt level. If the salt level is still too high, repeat the process. If it's too low, add salt according to your chlorinator's instructions.
Important Considerations:
- Safety: Always follow safety precautions when handling pool equipment and chemicals.
- Water Chemistry: Adjusting the salt level can impact other water chemistry parameters. Test and adjust the pH, alkalinity, and calcium hardness accordingly after refilling.
- Professional Assistance: If you are unsure about any part of this process, consult a qualified pool professional.
