Does Bleach Remove Hard Water Stains?

Thanks for sending in your question.  Clorox® Regular Bleach₂ has so many terrific uses, but every once in a while I get a question where my favorite product is not what the person is looking for, and your question falls into that category!  The main reason is that some cleaning challenges like hard water stains require acidic cleaners (pH less than 7).  Rust is another one.  Unfortunately for your specific application, Clorox® Regular Bleach₂ is pretty strongly alkaline, and furthermore should never be mixed with any acid.  We have other products to offer consumers to meet these cleaning challenges.  One that should work for you is our Toilet Bowl Cleaner-Tough Stain Remover.  You can read more about it here:  /products/clorox-toilet-bowl-cleaner-tough-stain-remover/

I hope this is helpful.  Please let me know if you have any other questions, and thanks for writing!

–Dr. Laundry