Re: Hard water
we had REALLY bad hard water where we used to live. Pocket diapers were HORRIBLE, and always gave bad rashes. what really added to this was we didn't have any way of running Hot water to the washing machine.. Miserable. My best advice is to add water softener to each load if you start seeing rashes or rust spots.. we never did have rust spots, even though our shower could turn orange in a few days!
we had a lot better success with pre-folds, because they can be boiled, and the rashes went away in pre-folds. pockets just did not work.