Actually I was wrong. When I was over by the FBT's viv, I looked at the package with the unused brick of moss . What I have is from Exo-Terra and they call it Forest Moss. Claims to be "totally" safe for all sorts, including frogs. It's worked well for me ever since my first FBT six or so years ago. It does strong smell when you get your nose in it, but it's a individual thing as to whether it's unpleasant of not. I do have to replace it about two times a year as it starts to rot eventually.