I have that blue stain in my bathtub

enter image description here

The stain comes from my plumbing, which probably contains copper that rusted and creates that stain.

I tried to remove it with bleacher but to no avail.

Do you have any ideas on how I can remove copper stains like this one, please?


  • 1
    You can try vinegar.
    – ajeh
    Aug 9, 2017 at 14:09
  • 1
    hi @ajeh, the test was successful. Please write your comment as an answer, I will accept it.
    – Andy K
    Aug 9, 2017 at 15:34
  • 2
    But the next question is, why are you getting copper stains? I would be worried that something is wrong with water or piping.
    – ajeh
    Aug 9, 2017 at 20:00
  • @ajeh long story short. My boiler was having massive issues causing over heated water, changed it, change the fausset that was oxydating and now, everything is good.
    – Andy K
    Aug 16, 2020 at 17:20

2 Answers 2


Vinegar should be able to dissolve copper stains. Those stains are commonly copper hydroxocarbonate AKA copper carbonate hydroxide, which easily dissolves into copper acetate.


There are products sold for your specific issue. Check your local hardware store or home improvement center for CLR (Calcium-Lime-Rust) cleaner. CLR is a specific brand name but there are many formulations of similar products available.

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