Is it just a coincidence or what when the subject of "Argyria" shows
its ugly head, especially when "CODEX" looms around the bend?!
I for one may be a dummy when I see so many abbreviated words
used in re to "CS" or "EIS", but the board has always been kind
enough to decipher them for me and others.  I have "Emphysema"
and am on O2 24/7.  When I forget to hook up my "Helios"  portable
to my side when I arise, I have the tendency to get "purple" cuticles
for lack of oxygen, and the same for my nose.  The great  posters             
                       here have made it common knowledge that pure, 
distilled H2O is  a                               prerequisite to making the 
desired 
end-product, and not tap water!
Am I alone in this thinking?!   Pete