Do salt systems permanently discolor plaster pool surfaces?

No, salt systems do not permanently discolor plaster pool surfaces. Salt systems use a process called electrolysis to convert salt into chlorine, which is used to sanitize the pool water. This process does not produce any chemicals that would discolor the plaster surface of a pool.

However, it is important to note that salt systems can cause temporary staining of the plaster surface of a pool. This staining is usually caused by the buildup of calcium carbonate, which is a natural mineral that can be found in pool water. Calcium carbonate staining can be removed by using a pool clarifier or by brushing the pool surface.