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Current IssueSeptember 21, 2014
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Ask The Expert: Pool salt levels
03/01/2007 
 
Question:

I have a swimming pool with a salt chlorine generator system. Why is it important for me to test the salt levels in my pool?

Answer: 

Testing the salt (sodium chloride)concentration in your water helps to ensure that the generator is producing chlorine at an acceptable level. When you add salt to your pool water, it is converted with electricity inside the electrolytic cell in the generator system. The cell converts the salt into free available chlorine that sanitizes the water. When the chlorine is used up, it once again forms salt that can be converted back into chlorine by the generator.

Most systems recommend a salt level of 2,500 to 3,200 ppm (mg/L). Generally, 3,000 ppm is the ideal level. However, be sure to consult your owners manual to determine what the ideal level is for your generator. If the level is too low, the generator may not produce sufficient chlorine and there is potential for damage to the cell. When the salt level is too high, the water can become cloudy and the generator may not function properly. In extremely high salt levels there is potential for corrosion of metal parts and equipment.

Answer provided by Joe Sweazy, Technical Sales and Service Manager for HACH Company/ETS Business Unit

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