How do you remove salt ring around pool?

Answer 1

Make sure that your generator is producing enough chlorine, then brush the "slime" off of the walls with a plastic brush for a liner pool or steel for concrete pool.

If your chlorine level is low you need to turn your generator up or perhaps you salt level is too low and you need to add more salt

Answer 2

If you own a gunite swimming pool and it is empty and you are attempting to remove salt build-up, you can acid wash the walls. Mix up Muriatic Acid 4 parts water to 1 part acid and brush down the sides and bottom. Follow up with the garden hose. If the pool is full and you are trying to get rid of the build-up, you may lower the pH & Total Alkalinity below the acceptable range and maintain those low levels while brushing down the walls and floor with a steel-wire brush (gunite pools only) for the better part of a week. Then raise those levels again and start adding a stain & scale preventative chemical weekly to prevent that from happening again.

Answer 3

If it were "salt" it would brush right off. What you are describing is probably a combination of salt and hard water deposits IE: calcium.

There are products sold in pool stores that contain acid that will help dissolve the deposit so you can scrub it off.

If the build up is heavier you might try a pumice stone.

Failing that you will probably need a professional. The old school method is blast with glass beads. A newer safer method is power wash with mineral salts injected into the water stream.