Iron Out! Bought tonight, best stuff ever!! I had a gross yellow ring in my toilet from hard water... Tried everything. Less than $4 at walmart and it is gone! Put 1/2 cup in water of bowl, sat for 10 minutes and flushed. Not even a scrub. So easy it's crazy!!
Throw a denture tab in your toilet’s tank and bowl every week to keep a ring from forming, and to keep it sparkling like new. This also works on electric tea kettles and coffee pots! takes up that annoying calcium deposit quickly and rather cheaply. (A box of 40 is around $3)