baking soda
Dread Maintenance
Ok, cool. From the maps of hard water in the US, it looks like you've got some moderately hard to hard water.
There are easy ways to make your own distillery so you can remove the minerals from your water. All it takes is a big bottle, or 55 gallon drum (if you can get your hands on one), about 10 feet of hose or piping that you can coil, a smaller water container to catch the pure water, and some black and white paint.
Outside where you get the most and longest sun: Raise the bigger container about 3-4 inches off the ground, attach your tubing to a hole in the top, coil it to that it's only about 3 feet long, attach it to the smaller container on ground level. Paint the big container black to absorb heat, and the tubing and small container white to cool it down. Make sure the connections between the containers and tubing at tight and you're all set.
You could also buy distilled water. Not sure where to there. Not sure if natural spring water would work, but it might. Ask Eagle.
Or, to make life all the easier, you could just buy a soft water filter for your shower head