Planto, I have just submitted a "Mounting How To" on ATP but who knows if/when it will be published. I would certainly mount that Tillandsia and grow it the way it grows in nature. Tillandsia's roots don't play much part in nourishment and are mainly for anchoring the plant to a surface. Tillandsia do much better when kept on the dry side and easily rot if kept too wet. In my experience, it is hard to grow them in moss or potting soil, simply because of the water retention of the media. Others with more experience/knowledge growing Tillandsia might give another answer.
