Recommended coolant type

I lived with my GF from 1982-1985 and she was a blond. Except at our house. She became a red head. There were so many minerals in the water it turned her hair red. The water was 100% nasty. Dishwashers, water heaters...anything like that didn't last very long. That water ruined everything.

I have well water now and it is about perfect but that water was nasty.
St Johns? Or Vancouver?