Driftwood & Roots are excellent design elements in the aquarium. There are various types, all of which are well suited for use in the aquarium. The roots should be watered or if possible even boiled before use in the aquarium. If a root still floats up, you can attach a stone to the root (preferably with a stainless steel screw) and bury it under the gravel or substrate. Smaller roots are also very suitable for binding or sticking mosses or plants.