The industry is still debating this question, but there is anecdotal evidence that suggests a salt system may adversely affect some of the “softer” stone work that may be around your swimming pool. Unsealed limestone in particular seems to be somewhat susceptible to etching from salt water, especially here in Texas.

A fairly easy cure for this is to simply seal the stone work with high-grade sealant. (A Better Pool Service offers this service at a very reasonable price.)

There have been little to no reports of saltwater etching on any of the harder materials such as granite, tile, plaster, pavers, or even broom finished concrete.