What should be done after a heavy rainfall in terms of pool care?

After a heavy rainfall, it's essential to check both the water levels and the chemical balance of the pool. Rainwater can dilute the pool's chemicals, affecting the pH levels and chlorine concentrations. This dilution can lead to water that is not adequately sanitized, which may create an environment conducive to algae growth or allow contaminants to flourish. By checking and adjusting the water chemistry, pool operators can ensure that the pool remains safe and inviting for swimmers.

Other options may not be practical or effective responses to heavy rainfall. For instance, replacing all the pool water immediately could be unnecessarily excessive and costly, as it would take significant time and resources to refill and re-establish the chemical balance. Simply closing the pool for a week may not address the underlying issues caused by the rainfall and does not provide a proactive approach to pool maintenance. Increasing the temperature is unlikely to have any significant effect on the immediate impacts of rain on water quality and could lead to increased evaporation and energy usage without addressing potential chemical imbalances.