all water that comes from a natural spring or brook or river is mineralized. mineralizing water is completlely natural, mother earth does it all the time. animals drink mineralized water, not distilled water.
putting a little salt in the water does not make it taste salty at all, in fact it gives it a very slight earthy flavor, but very sublte. of course i am talking about good salt like celtic sea salt.
i like to use Concentrace Mineral Drops in mine, it is a full spectrum mineral source and very good. MH sells a veggie mineral thing, why don't you add that to your water? other thoughts - get some river rocks and put them in the jug or some crystals. i swear my crystal energized water tastes better. anyway just some thoughts.
water is an amazing thing, it will respond to our thoughts and emotions. read more here.