I don't think that is an R/O Filter because it does not have the filament on the top like others I have seen that you need to replace like once a year. I believe that is a chlorine removal / filtration system. They work really good but do not remove salts.View attachment 3204831 Is this a R/O system. Dont know much about all it this is the water system im using for my plants at least I know its better then tap.
Ya I've noticed salts in bottom tray after water dries upI don't think that is an R/O Filter because it does not have the filament on the top like others I have seen that you need to replace like once a year. I believe that is a chlorine removal / filtration system. They work really good but do not remove salts.