I just moved, and went from extremely hard water (the minerals gave me "natural" red highlights, there were so many of them), to soft water. I notice that I need to use less conditioner, but I've also noticed that my hair seems flatter. Not less curly, but I just don't have the volume that I did with the hard water.
Has anyone gone from using hard water to soft water? How did your routines change? Mine is pretty simple. I use VO5 for CO washing and as a conditioner, plop with Biolage Gelee, and sometimes I use clips at my part to add volume. I use baking soda when I need to clarify.