Some people start with distilled water and add chemicals to match the water profile for the traditional location. Burton salts are a common example.
CDO can be treated. (like OCD, but the letters are in alphabetic order)
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk