Thanks for the reply PoolDoc.

Sometimes it is better to be lucky than good I suspect there has been a fundamental engineering change to the SWCG (in addition to adding a copper generator that is useless) that has caused the change.
But anyways, the sodium chloride (salt) is measured by a dipstick and/or a conductivity meter, not by any chemical means. The pH probes is indeed calibrated with Fisher scientific pH 4 and pH 7 standards (I am a chemist and microbiologist during the day, and easily have access to the expensive pH meters to have an orthogonal technique to compare my pH probe to. In addition, I have used the phenol red (significantly less sensitive than our pH meters), yet another orthogonal technique, to confirm the pH probe readings).
I think I mentioned previously that I did have a test kit (OTO style), but if not my omission. I purchased a 6 way kit tonight, and have posted the results in a previous thread (approval pending).

I appreciate the advice to try to get things under control without the SWCG, trying to isolate if that is truly the problem. That is a good plan. I will also follow the advice with the sodium hypochlorite and report back.

Thanks again for the advice,
Rob