What should be done when a pool’s saturation index reading is positive?

When a pool's saturation index reading is positive, it indicates that the water is under-saturated, which can lead to corrosion of pool surfaces and equipment. A positive saturation index suggests that the water may not be in equilibrium with its surroundings, meaning it can dissolve calcium and other minerals from the pool surfaces, which is undesirable.

Monitoring water balance is crucial in this scenario because it allows for a more complete understanding of the pool's chemistry. Regularly checking and adjusting parameters like pH, total alkalinity, and calcium hardness is essential for achieving a neutral saturation index, which reduces the chances of equipment corrosion and promotes a stable, safe swimming environment. By focusing on water balance, you can implement necessary adjustments based on the overall pool conditions, maintaining optimal water quality and minimizing potential issues related to under-saturation.

Incorporating effective monitoring ensures that any corrective measures taken—such as adjusting pH levels or adding calcium hardness—are based on precise data, leading to a healthier pool environment.