So I have a salt water pool built in 2013 with flagstone here in texas and my stone is so bad I am back here researching and getting bids on renovating already.. to remove the flagstone its so bad... and we have sealed it... but we do love the salt water feel.... my neighbor has travertine and salt and its holding up very nice.....George.
Saltwater does not damage stone, otherwise the Atlantic and Pacific oceans would have dissolved the US by now... Sea water is 35000 ppm and saltwater pools are about 3400 ppm. About the same as your tears... Last time I cried, it did not eat my cheeks off..
The main problem with saltwater pools are the pool builders.. They have no clue how they work and were selling them on the theory that you turn them on and that they would run forever and nothing else needed to be done.. That is just not the case. All the SWCG does is to make chlorine out of the saltwater.. It is the same chlorine that you would get from tablets or from Liquid Chlorine. The pool owners still have to routinely test and make sure all the chemicals are in balance..
I have three saltwater pools and have had zero corrosion or erosion problems..
Tell us why you want an IFCS... Almost all of what their marketing says is just one word short of a lie...