I have that blue stain in my bathtub
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?
Thanks
Best Answer
Vinegar should be able to dissolve copper stains. Those stains are commonly copper hydroxocarbonate AKA copper carbonate hydroxide, which easily dissolves into copper acetate.