I've got a 26 gallon tank with four pieces of driftwood and about 10-12 plants, but can't find anything to fill the top half. The largest piece of driftwood I could find is only about 8-10" high, and the tank is about 18-20" tall, so there is about 8" of bare space. I just planted my plants today so hopefully the anacharis will grow and cover some of it up, but does anyone know where to get tall, natural-looking driftwood???