A strong salt water solution will certainly cause problems, but again, there is very little salt in this pool, only enough to make the water conductive for the ionizer to work. I will try to catch up with my neighbor and find out more. Ocean salt water is very salty, and I agree that this level of salt does damage iron, concrete, and stone.
I found this website that has some good explanations about salt water pools and the equipment. https://www.discountsaltpool.com/Com...hoC_k4QAvD_BwE
I copied this out of the link above because it relates directly to your concerns, but please go to the link, because there is a lot more information there.
Below is the information that I copied -
Which salt pool system is compatible with my pool & equipment?
How do you know if your pool is compatible if you install a saltwater chlorine generator? There are only a handful of cases where there would be incompatible water chemistry, equipment, or materials. The vast majority of people's pools are compatible as they are- however, below are some examples of things to double check for if you are concerned.
There are very few water chemistry conditions that would prevent you from converting your pool to saltwater. If you are using traditional chlorine in any typical form, you don't have to worry: your water is completely compatible, and you do not need to drain the pool or make any major changes. The salt pool system can be installed and will easily take over water sanitization. The most common chemical issue pool owners face is if they have been using the chlorine alternatives called biguanides, often under the name "Baquacil" or "Soft Swim". Most pool owners simply wait for such chemicals to dissapate to a low enough level in the pool over the winter before converting to a saltwater chlorine generator.
Saltwater chlorine generators are designed to work with your existing pump and filtration system, and are installed in addition to what you currently use. Many pool equipment manufacturers will even advertise that their pumps and fitlers are compatible with saltwater up to a high level of salinity. The most common equipment issue pool owners face is on very, very old pools that use iron or copper plumbing pipes, which are almost non-existent nowadays.
Salt systems can be used on pools that are made of concrete, gunite, plaster, tile, vinyl, fiberglass, stone and more, and are common on in-ground and above-ground pools. Saltwater chlorine generators have been safely used on pools across the country for decades, and now its more common to have a saltwater pool than to not. If you have used rare or exotic materials in your pool construction, always check with your pool builder to ensure that there are no special requirements for your unique pool design.