Effects of Hard Water and Hair Loss

Some variation of this question has been posted on this blog before but I would like to ask:

Can hard water indirectly cause hair loss? I am not asking about the effects of hard water on genetic baldness but whether hard water can aggravate scalp conditions in sensitive subjects, thereby accelerating hair loss. I suffer from seborrheic dermatitis and I am noticing more aggressive hair loss when washing with hard water compared to soft (my parents have a water softener).

If so, what do you recommend doing? Is there any benefit to washing with soft water or distilled water? Is this hair loss permanent?

Hard water just means it has higher mineral content in general. It does not cause or accelerate hair loss as far a I am concerned. If you think it is affecting your hair, you can always try soft water. But I personally do not see its benefit with respect to genetic hair loss, more of a washing issue