HOBBY Spaghnum MossSphagnum Moss is 100 % natural moss for the terrarium in the form of a compact tile. The Sphagnum Moss tile swells up by adding ca. 1. 5 liters of tepid water which actually produces ca. 4. 5 liters of ready to use moss from such a small size. It is ideally suitable for raising the humidity in the terrarium and keeping it stable over a longer period. Especially those terrarium inhabitants with high humidity requirements appreciate its qualities.