Hi, we recently moved into a new apartment in Denmark, and the bathroom floor is really yellow. I'm not quite sure how to describe it, but it looks a bit like pebbles set in clear resin or something, but it's extremely hard wearing. I get the feeling that the colour might be due to limescale (as we have very hard water here, and the limescale on the tiles was yellowy), but I'm not sure. I've tried bleach and limelite gel (separately) but neither seems to have helped. Any ideas? Thanks, from Ida.