How to Fix a Green Pool (Algae Removal Guide)
A green pool is usually a sign of algae growth, which can develop quickly when water chemistry is off or circulation is limited. While it may look overwhelming, most green pools can be cleared with a few focused steps.
This guide walks you through how to remove algae and restore your pool to clear, balanced water.
Why Pool Water Turns Green
Algae spores are always present in the environment and can enter your pool through wind, rain, or debris. When sanitizer levels drop or water becomes unbalanced, algae can begin to grow and spread quickly.
- Low or inconsistent chlorine levels
- Poor water circulation or filtration
- Imbalanced pH or alkalinity
- Debris left in the pool
Step-by-Step: How to Clear a Green Pool
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Remove debris.
Skim out leaves and debris to reduce materials algae can feed on and improve water circulation. -
Brush pool surfaces.
Brush walls, steps, and floor thoroughly to break up algae buildup and allow treatment to work more effectively. -
Balance your water chemistry.
Test and adjust pH and alkalinity before adding treatment. Balanced water helps chlorine work more efficiently. -
Shock the pool.
Add a chlorine shock treatment such as Doheny’s Super Shock Plus to kill algae and sanitize the water. Follow product instructions based on your pool size. -
Run your pump continuously.
Keep your filtration system running to circulate chemicals and remove dead algae from the water. -
Clean or backwash your filter.
Dead algae can quickly clog your filter. Cleaning or backwashing improves flow and speeds up clearing. -
Repeat if needed.
Severe algae may require additional brushing and shock treatment before the water fully clears.
Using Algaecide for Additional Support
For stubborn or recurring algae, adding an algaecide can help eliminate remaining growth and prevent it from returning.
A product like Doheny’s Super Algaecide Plus can be used after shocking or as part of ongoing maintenance to help keep your pool clear.
• Doheny’s Super Shock Plus – Helps eliminate algae and sanitize water
• Doheny’s Super Algaecide Plus – Helps prevent algae from returning
These products can be used together as part of a complete algae treatment process.
How to Prevent a Green Pool
- Test and balance water regularly
- Maintain consistent chlorine levels
- Run your pump daily for proper circulation
- Brush and vacuum weekly
- Clean your filter as needed
Consistent maintenance helps create an environment where algae is less likely to grow, keeping your pool clean and ready to use.
Need Help Clearing Your Pool?
If your pool is not clearing up or you're unsure which treatment steps to take, our Doheny's Customer Care team is happy to help.
📞 Phone: 800-574-7665
💬 Contact Page: www.doheny.com/contact
🌐 Help Center: www.doheny.com/help