okay so ive fallen in love with driftwood. ive had a couple pieces of african root in my angel/discus tank for about a year (havent had the fish that long yet though) and its been great. it has kept my pH down at about 6.5 (reason iswitched the tank to angels/discus) and it looks great. however im going to be moving the wood and fish to a larger tank. i was wondering if i could add grapevine wood. ive seen some nices pieces at my store in the reptiles section adn had them sitting in a different tank to soak up water so theyll sink. they are now sinking but it looks like there is some kinda mold or something in a few small areas of the wood. i dont have any fish in the tank ive been cycling the wood in so i dont know if itll kill fish or why there is the funny residue. im thinking maybe i didnt rinse the wood enough and it was just some dust or something. if anyone has had experience with grapevine wood in aquariums i would GREATLY appreciate any advice. thanx.