What is a common symptom of algae growth in pools?

A common symptom of algae growth in pools is cloudy water. When algae proliferate, they can create a murky or cloudy appearance due to the particles released into the water and the presence of small algae blooms. This cloudiness can be particularly pronounced in swimming pools, leading to visibility issues and compromising the water quality.

In contrast, clear water would indicate healthy water conditions and effective filtration, thus not suggesting any algae presence. Increased pH might occur due to various factors but is not a direct symptom of algae growth on its own. Similarly, low chlorine levels may be a consequence of algae consuming chlorine or insufficient disinfection, but the clarity of the water remains a more prominent indicator of algae's presence. Therefore, cloudy water serves as a clear and recognizable symptom that pool operators should monitor to maintain proper pool hygiene.