Why is my pool green?

Algae is the most likely cause of your pool turning green. When chlorine levels fall below the recommended levels (1-3ppm in standard chlorine pools, .5-1 ppm in mineral system pools), even for a day, algae can grow. Algae is easy to kill & manage using a combination of shock and algaecide. The amounts needed vary depending on pool size and amount of algae growth.