The Mbuna's "trunk" is made of a hand-picked, interesting looking bit of root wood from the African savanna. The striking "treetop" consists of the dwarf spear leaf Anubias nana. The MBUNA are grown in special plastic green-houses under tropical conditions, so they carry on growing when you place them in your aquarium: "The "treetop" becomes thicker and larger and the loose, liana-like root "beards" are especially attractive. MBUNA look like venerable tropical rain forest giants in small format. With the MBUNA you can create decorative tree groupings or outright underwater forests.
Note: The picture shows a typical piece but each is of course different as it's a natural product. It will sink immediately and possibly release tannins into your water which is very natural.
If you are looking to remove tannins from your water we recommend using Seachem Purigen 100ml - this is a fantastic product that works brilliantly on tannins.