Why Is My Pool Green?

Why Is My Pool Green And How to Fix It Fast

Discovering your pool has turned a murky shade of green can be unsettling, especially when you're looking forward to a refreshing dip on a hot day. This common issue is typically caused by algae growth, but it can also result from metal staining or poor filtration. Understanding the underlying reasons and how to tackle them can restore your pool's water to its crystal-clear state.

Algae Growth: The Primary Culprit

Algae are microscopic plants that thrive in water and sunlight. While there are several types of algae, green algae are most commonly responsible for turning pool water green. Factors contributing to algae growth include:

Inadequate Chlorination: Chlorine levels that are too low can't effectively kill algae and bacteria.

Poor Circulation and Filtration: If the water isn't moving or being filtered properly, it becomes a breeding ground for algae.

Imbalanced Water Chemistry: Incorrect pH, alkalinity, and calcium hardness levels can promote algae growth.

Lack of Maintenance: Skipping regular cleaning and maintenance schedules allows algae to take hold.

Metal Staining

In some cases, green water might result from metals, like copper, being introduced into the pool. This can occur through corroded copper pipes or by adding algaecide that contains copper. When copper levels are too high, and the pool chemicals are imbalanced, the water can turn green.

How to Fix Green Pool Water

Turning your pool from green to clean involves several steps:

1. Test and Balance Water Chemistry: Start by testing your water's pH, chlorine, alkalinity, and hardness levels. Adjust these to within the recommended ranges.

2. Shock Your Pool: Apply a shock treatment to kill algae and bacteria. This usually requires a much higher chlorine level than normal.

3. Brush and Vacuum: Manually brush the pool walls and floor, then vacuum to remove dead algae and debris.

4. Run the Filter: Keep your filtration system running continuously for 24-48 hours to clear the water.

5. Algaecide Application: After shocking, an algaecide can prevent future algae growth. Choose one that's appropriate for your pool type and doesn't contain metals.

6. Maintain Regular Cleaning: Regularly brushing, vacuuming, and maintaining your pool's chemical balance can prevent the water from turning green again.

Preventive Measures

Preventing green water starts with regular maintenance and monitoring. Keep your pool's chemical levels balanced, ensure the filtration system is functioning correctly, and regularly clean the pool and its components. Additionally, consider using a pool cover when the pool is not in use to reduce sunlight exposure and debris accumulation, which can both contribute to algae growth.

Conclusion

Green pool water is a common issue that pool owners face, but it's also a fixable one. By understanding the causes and taking the necessary steps to address them, you can enjoy a clean, clear pool once again. Remember, regular maintenance is key to preventing future problems and ensuring your pool remains clean and clear all season long.

If you need professional help with a green pool in Sacramento, please contact us.

About The Author

Meet John Melby, the face behind Quality Pool Cleaning. With a heart rooted in community and hands skilled in pool care, John extends his expertise through these insightful blogs. When he's not making pools sparkle, he's here sharing tips to help you enjoy a cleaner splash. Welcome to our pool-loving family!