I did some searching on here and found lots of threads that mention potential damage to SWG plates or other potential problems from sulfates.
The Wikipedia entry on Salt Water Chlorination says that HCL is a necessary part of the system to convert the Sodium Hydroxide back into Sodium Chloride and implies that built-up sulfates from sulfuric acid are a problem because they conduct electricity without giving you the benefit of producing a sanitizer.
This all sounds reasonable to me (I'm not a chemist) - is it essentially correct or hogwash?
I think my basic question is whether added CL from the acid is necessary to replace CL2. I would think you'd have to have an awful lot of sulfate for it to affect the efficiency of the SWG.