Once again many thanks to both of you and Steve Coach for your immediate and extensive consultations.
I am ordering the AquaSmarter ionizing capsules for my 1,500 gallon spa. Much appreciation as well for the reference to Multiple Chemical Sensitivity Syndrome - I had not heard of this before and it definitely describes the previously inexplicable symptoms/condition that I have been experiencing for years now.
Your communication has far exceeded my expectations. Wishing you all the best, Mike