Water Chemistry 101

Water Balance

Your pool water is delicate, and in order to reach perfect pool harmony, it must be balanced.
Balancing your pool means keeping the pH of the water between 7.4 and 7.6, which is slightly above neutral on the pH scale.

There are 3 main ingredients to keeping this balanced: pH, alkalinity and calcium hardness.



Proper pH Level: 7.4 to 7.6

pH alone is unstable. Rainwater, swimmers, and just about anything that enters the water can affect the pH level. When pH is low, it means your water is acidic, and when it’s high, you water is basic.

To give you an idea of how pH works, our tears are pH neutral. If they had a low pH, it would burn when we cried. And if the pH was high, it would dry out our eyes.



Proper Alkalinity Level:
 100 to 150 ppm

Alkalinity is a pH buffer, meaning it helps to keep the pH from drastically moving up and down the pH scale by absorbing major changes to the waters before affecting the pH.

Calcium Hardness

Proper Calcium Hardness Level:
 175 to 225 ppm and 200 to 275 ppm for plaster pools

Without calcium, your water will become hungry for it and seek to fulfill it’s appetite by feasting on your pool’s plaster, and anywhere else it can get it.

Adding calcium hardness to your water will help protect your pool walls and equipment in the long run. However, too much calcium can cause scaling and other issues.