I have really hard water in my area (Inland SoCal) and my toilet even though it is clean has hard water ring stains. I have used Clorox toilet bowl cleaner w/bleach, Clorox tabs (which I know are supposedly a no no now; but they always worked for me in the past and never caused leaks or parts to corrode), and recently tried Iron Out (6000+ positive Amazon reviews) and I still have pesky rings in the toilet bowl.
I grew up in an area (Sacramento) with really hard water that without a Brita filter (or water softener tank) looked like this, but our toilet never had water ring issues. This scene from Walk the Line where Johnny Cash insults the yellow prison water is no joke….the water where I grew up was really cloudy like this (but no toilet rings) and my mom cannot do dishes without LemiShine.
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