How do you stop a pool from going green?

1. Maintain proper chlorine levels. Chlorine kills bacteria and algae that can cause green water. The ideal chlorine level for a swimming pool is between 1 and 3 parts per million (ppm).

2. Shock the pool regularly. Shocking the pool raises the chlorine level to a higher level for a short period of time, which can help to kill off bacteria and algae that are resistant to chlorine.

3. Keep the pool covered when it's not in use. This will help to prevent sunlight from breaking down the chlorine in the pool.

4. Clean the pool filter regularly. A dirty filter can trap bacteria and algae, which can then grow and cause green water.

5. Balance the pool water. The pH level of pool water should be between 7.2 and 7.8. If the pH level is too low or too high, it can affect the effectiveness of chlorine.

6. Use a metal sequestering agent. Metal sequestering agents bind to metals in pool water, which can prevent them from reacting with chlorine and causing green water.

7. Use an algaecide. Algaecides kill algae that can cause green water.

By following these steps, you can help to keep your pool water clean and clear all season long.