What type of algae is known as "black algae"?

Black algae is primarily recognized as a type of blue-green algae, also known scientifically as cyanobacteria. This classification is significant because blue-green algae are not true algae but rather a group of photosynthetic bacteria. The characteristics of black algae include a dark, almost black appearance due to a unique pigmentation and a tough, protective layer, which makes it particularly challenging to eliminate from pool surfaces.

The presence of black algae indicates poor sanitation or water balance in the pool, and they often embed themselves into fissures on surfaces, creating a strong bond that is resistant to standard cleaning practices and treatments. This makes specific approaches, such as the use of algaecides and vigorous scrubbing, necessary for successful eradication.

Understanding the nature of black algae as a blue-green species provides insights into prevention and treatment strategies in pool maintenance, underscoring the importance of regular cleaning and water testing to inhibit its growth.