Which type of algae is the most common in swimming pools?

Green algae is the most common type of algae found in swimming pools. This type is typically characterized by its rapid growth and ability to form green, slimy patches on pool surfaces, including walls, floors, and ladders. Green algae thrive in warm, sunny conditions and can multiply quickly if the pool's water is not properly balanced or sanitized. Regular maintenance, including proper filtration, circulation, and chemical treatments, is essential to prevent and control its growth.

The distinctive characteristics of green algae, along with its prevalence, make it more frequently encountered in swimming pools than other types, such as black algae, red algae, or yellow algae. Each of these other types can also appear in pools, but they tend to be less common and present different challenges in terms of management and eradication.