What to do clear algae growth in chlorine system pool?

1. Test and Adjust the Water Chemistry: Algae thrives in certain water conditions. Use a pool test kit to measure the pH, chlorine level, and other important parameters. Adjust the pH to between 7.2 and 7.8, and maintain a chlorine concentration of 1-3 parts per million (ppm).

2. Shock the Pool: Use a chlorine shock treatment to raise the chlorine level to 10-20 ppm. It gives a rapid boost of chlorine to kill algae spores and eliminate any existing algae growth. Run the filter continuously for at least 24 hours to circulate the shocked water.

3. Brush and Vacuum: Use a pool brush to agitate the algae from the pool surfaces, including the walls, floor, steps, and any objects in the water. Vacuum the algae and other debris using a pool vacuum. Ensure you reach every corner and crevice where algae may be hiding.

4. Control Phosphates: Phosphates are nutrients that can promote algae growth. If your pool water has high phosphate levels, consider using a phosphate remover or a specialized algaecide that controls phosphates.

5. Maintain Proper Circulation: Ensure the pool filter and pump are working correctly and running at least 10-12 hours per day. Good water circulation helps evenly distribute the chlorine throughout the pool and prevents stagnant areas where algae can grow.

6. Cover the Pool: When not using the pool, cover it with a pool cover. It prevents sunlight from penetrating the water, inhibiting the growth of algae.

7. Regular Maintenance: Stick to a regular cleaning and maintenance schedule for the pool. Skim the surface regularly to remove debris, and brush and vacuum the pool once or twice a week. Regular maintenance will prevent algae from building up in the first place.

8. Consider Additional Treatment: If the algae problem persists, consider using a copper-based algaecide according to the manufacturer's instructions. Copper can be effective in controlling algae growth.

Remember always to follow the instructions on the pool chemicals and algaecides you use to ensure safe and effective treatment.