I live in a small town where the water treatment to me is suspect, I don't know if this is a factor, I am however convinced that it is a lack or influx of too little or too much chemicals, in the morning here I can run the run the water and I get a very pungent smell of chlorine, I use a ionizer to filter, manipulate and ionize the water in an attempt to get better a better drinking experience. I mean just look up water treatment online, theres a list of chemicals used, 14 that I have seen so far and this is just what they are telling us, it's really scary how much control they have over our water and everything else we ingest. Here is just a few used, Algaecides,antifoams, Biocides, coagulants, disinfectants, Oxygen Scavengers, I mean it sounds like a chemistry experiment, I mean we are not dying from the water I guess, at least not immediately, but back to the original reason i'm posting the black ring is basically a mold, although I never experienced it in Charlotte, NC, but here in this smaller town obviously the water is treated differently, but I notice it more on my spare bathroom where the commode is rarely used thus not being flushed daily, I try and make it a point to do this but forget and when I go in there's the dreaded black ring, so to the guy who wrote in about Diabetes, I think it has absolutely nothing to do with your black ring, in my opinion based on what I see here in my home, I also work in Charlotte and never see this in the units at work, I think it is more obvious from city to city or county to county, depending on the water supply and the direct treatment procedures used in waste water, we do in actuality re-use the same water that goes down the drain, kind of gross if you think about it.. Tommy...
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