How do you get green algae off plaster pool walls?

1. Scrub the algae with a pool brush. Use a stiff-bristled pool brush to scrub the algae off the pool walls. Be sure to scrub in all directions, including the corners and crevices.

2. Rinse the pool walls with water. Use a garden hose to rinse the pool walls thoroughly. Be sure to rinse away all of the algae debris.

3. Repeat steps 1 and 2 as necessary. You may need to scrub the algae multiple times to remove it all.

Method 2: Chemical Treatment

1. Shock the pool. Adding shock to the pool will kill the algae. Follow the directions on the shock package for how much to add to your pool.

2. Brush the pool walls. After shocking the pool, brush the pool walls again to loosen any remaining algae.

3. Run the pool filter. Run the pool filter for at least 24 hours to circulate the water and remove the dead algae.

4. Rinse the pool walls with water. Use a garden hose to rinse the pool walls thoroughly. Be sure to rinse away all of the dead algae debris.

Prevention:

To prevent algae from growing in your pool, you can take the following steps:

* Keep the pool clean by removing debris regularly.

* Keep the pool water balanced.

* Shock the pool regularly.

* Run the pool filter for at least 8 hours per day.

* Cover the pool when it is not in use.