Last year a number of PF users decided to try something different. One after another, a limited group of users became our own guinea pigs to determine if there was any benefit to adding/increasing salinity in our pools, without the use of a SWG. From what I recall, the group consisted of AG pool owners, but I will double check my facts soon and update as needed. The entire idea was born out of complaints regarding chlorinated water, eyes, hair and skin.
I am not great at calculations but it seems to me that, with our pool size and 120# of solar salt, we got numbers somewhere around 700ppm. The water felt SO nice. My kids could swim with their eyes open, our hair and skin were softer after swimming. These are my observations and opinions, not scientifically based or proven facts, but I wasn't alone in those observations.
There was great concern about some posters regarding damage the salt may cause to equipment and materials. There were discussions and pondering sessions regarding freezing points. There were notations about bouyancy. The thread was active and continued so that it became HUGE. Would anyone who participated in the experiment care to add any facts or specifics for the courious? Maybe we can condense our findings so we don't repeat the size of the thread at PF (makes it hard for someone to know whats what without reading PAGES and PAGES)