How does rainwater typically affect the salinity of saltwater pools?

Rainwater typically dilutes the salt levels in saltwater pools. This occurs because rainwater is generally less saline than the water in the pool. When rainwater enters the pool, it adds a significant volume of freshwater, which can lead to a decrease in the overall salinity of the pool's water. The salt concentration is determined by the ratio of salt to water, and when freshwater is introduced, it reduces that ratio, thereby diluting the salt content. Maintaining proper salinity levels is crucial for the performance of saltwater chlorinators and overall pool health, making it important for pool operators to monitor and adjust salinity after significant rainfall.