I went to a big well know chainstore with my girlfriend and they have a lot of arts, crafts, decorations, etc. They had these really cool pieces of decorative wood called grapewood, like the one shown in the pic. I touched it and it has a wood smell, wood texture so I guess it's real wood. It says grapewood comes from some place in California or something. Has anybody ever used grapewood in their tanks succesfully? And if so, how did you cure it, treat it? Etc.