I have to add to my previous message, that I drink always distilled water in normal circumstances and during fast. Therefor, the salt load in my body is very different from the salt and mineral load of most people. I also very rarely use salt in my food. Whereas most people use it daily.
I.e. the minerals I had in the flush (Andes pink minerals) were the only minerals I ingested (and subsequently expelled) in these 9 days. Whereas most of the fasters do get minerals with their water all along.