There’s nothing worse than looking forward to a swim and finding your pool has turned green. Don’t worry — this is one of the most common issues pool owners face, and it’s usually easy to fix once you know the cause.
Why Pools Turn Green
Most green pools are caused by algae growth, which thrives in warm water, sunlight, and low sanitizer levels. The main reasons your pool might turn green include:
- Low Chlorine Levels – Without enough chlorine, algae can grow quickly.
- Poor Water Circulation – Stagnant areas allow algae to flourish.
- pH Imbalance – Chlorine is less effective if pH is off.
- Dirty Filters – A clogged filter can’t remove debris or algae spores.
How to Fix a Green Pool
Here’s a straightforward approach to get your pool clear again:
1. Test Your Water
Check chlorine, pH, and alkalinity levels using a test kit. Adjust to recommended levels — chlorine around 1–3 ppm and pH 7.2–7.6.
2. Shock the Pool
Add a pool shock product to kill algae. Follow the instructions carefully, and wait until it’s safe to swim.
3. Brush & Vacuum
Scrub the walls and floor to remove algae, then vacuum or use an automatic cleaner to clear it from the water.
4. Clean or Backwash the Filter
A clean filter helps remove dead algae and debris. Follow the manufacturer’s instructions for your system.
5. Maintain Proper Chemical Levels
Once clear, keep chlorine and pH balanced to prevent algae from returning. Regular maintenance is key.
Extra Tips
- Shock the pool preventively during hot months.
- Skim leaves and debris daily to reduce algae growth.
- Ensure your pump runs long enough each day to circulate water effectively.
Need Help?
If you’d rather leave it to a professional, Pool PHorce can turn a green pool into a sparkling oasis quickly and reliably.
