What role do pool stabilizers play in algae control?

Pool stabilizers, often referred to as cyanuric acid, play a crucial role in maintaining the efficiency of sanitizers, particularly chlorine, in outdoor swimming pools. When exposed to sunlight, chlorine can degrade rapidly, which diminishes its effectiveness in controlling algae and bacteria.

By adding a stabilizer to the pool water, the stabilizer forms a protective barrier around chlorine molecules, shielding them from the UV rays of the sun. This helps to ensure that the chlorine remains active and can continue to sanitize the water properly. Consequently, a well-stabilized pool has a more consistent level of sanitizer, leading to better algae control and overall water quality.

The other options do not accurately represent the function of pool stabilizers. While some features, like reducing evaporation and promoting algae growth, might seem relevant, they do not capture the essential role of stabilizers in maintaining sanitizer efficiency, which is critical for effective algae control.