Rainwater, while seemingly harmless, can influence your pool’s water balance in several ways. Here’s how:

• pH Levels: Rainwater is naturally slightly acidic, and when it enters your pool, it can lower the pH level. Imbalanced pH can lead to discomfort for swimmers and can damage pool equipment.
• Alkalinity: Rainwater can also affect the pool’s alkalinity levels, potentially making the water corrosive or prone to rapid pH changes.
• Dilution of Chemicals: Heavy rain can dilute the pool’s chemicals and sanitisers, rendering them less effective. This can lead to an increased risk of algae and bacteria growth.