jsaputra 0 Report post Posted December 8, 2013 Hi,I started to notice these stains on my floor outside of the toilet door and it has been growing bigger and bigger. And this morning I saw even darker stain on the marble wall under the sink.Wondering whether I could apply some poultice to absorb these stain in the pores e.g. Stonetech Stain Remover from Du Pont, or does this look like something more serious like maybe a leak in the piping under the marbles? Anyone out there has any good advice?Thank you!BR/JShttps://www.dropbox.com/s/53a16cel5u2n6ne/20131208_142021.jpghttps://www.dropbox.com/s/23mqg5z004lkfiv/20131208_141954.jpg Share this post Link to post Share on other sites