Brian_Nano12g
Aquarium Advice Addict
In some cases it's actual driftwood, or it's a hard wood species capable of being a driftwood (after being water logged and all). Something like manzanita is such an example. It's collected right off the tree, dried, in some cases sand blasted to remove the bark or what not. But point being, it's a hard wood known to not decompose in the water. Just have to be careful when using unknown wood, aside from pollutants, I've read some can have toxins usually kept for deterring insects and anything else that would like to munch on it.