Pause Swimming in a Green Pool
Do not use water that is green, poorly sanitized, or too cloudy to see the bottom clearly. Poor visibility can conceal a person or hazard. Keep children and pets away from chemical containers and any damaged, exposed, wet, or unusually hot equipment around the pool.
Avoid Pool-Chemical Guesswork
Green water is often associated with algae, but appearance does not establish the full water condition or correct treatment. Never mix pool chemicals. Follow product labels and do not stack treatments based on online shortcuts. Qualified water testing can prevent ineffective or hazardous additions.
Record Rain, Debris, and Circulation
Note when the color changed, recent heavy rain, storm debris, whether the pump appears to run, whether return flow is visible, and any product already added. Take a photo for your own record if it is safe. Do not open an electrical panel or pressurized filter to investigate.