Cleaning driftwood

I would just put them in a clean bath tub, free of soap residue, or a large rubbermaid container and brush clean with hot water. The rubber maid tub is nice because you also could do a pre-soak of it there.
 
You may need to saok the one from the beach to get any residual salt out. Are you sure the one from the bog is a hardwood?
 
The one from the bog is solid with no soft spots. Im new to driftwood so can you explain hardwood to me. The area of Maine I live in is surrounded by lakes, rivers, ponds, marshes, bogs and Im 20 min from the ocean. I like to go to these places and try to find the centerpiece for my planted tank.
 
Oh in that case I have no idea what it is. Here are some pics though
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