Orchid bark is a great potting mixture component that can be used to create aeration in your mix, or plant some orchids in! The main difference between coco husk and orchid bark is the water retention, coco husk retains water for much longer.
The difference between regular French tree bark and orchid bark is that orchid bark is steamed to prevent rot & mould.
-Allows oxygen in the soil/substrate
-Absorbs water readily
-Great for orchids