I am mounting some of my orchids and have something called SuperMoss (preserved sheet moss) that I had bought from a craft store. Will this be safe for my orchids or should I stick to sphagnum? The reason I bought this was because of the nice loom to it - vibrant green sheets. Am gussing this is because of the preservative? I rinsed it with water and the water ran green - is this natural colour or dye? The product claims it is natural product