As Branch wood has many small branches, it looks nice just by placing it in a layout. But it is cut artificially at the end of branches and roots, so you can keep the natural impression by attaching Willow moss to cover the unnatural sections.
*A stone or something to hold the Branch wood will be needed for initial stage as it may float due to buoyancy.
*Saprolegnia may appear during the initial stage. If it occurs, suction them out with a small tube frequently.