No. Certainly evaporation raises salinity, but that is not what I am talking about here. The main by product of combining parts 1 and 2 is salt. Over time, depending on how much you use, your salinity will rise.
Yes, Sodium Bicarbonate is one of the parts of Randy's two part.
Which is why SG can increase over a period of time.
I was wondering how do most people here dose/add mg (btw - also can increase your SG over a period of time)??