Normally, my tendency is to say, "If it's working, leave it alone".

But you have an SWCG, and calcium that high is likely to cause scaling. If you've been cleaning your SWCG regularly, and are not having problems with the plates being fouled with calcium, than you may want to leave it alone.

Of course, you want to make sure you are NOT chlorinating with anything that contains cal hypo (calcium hypochlorite).

Bottom line: if you have no scale build up on the tile line, and no problems with keeping your salt unit clean, leave it alone.