I have a large piece of wood that rises to the center of my 27 gallon cube. The very top of the wood is about 1 inch under the water surface. I would like to find a plant to mount on the top of the wood that would grow up out of the water. It should be less than 10 inches tall or so, be OK with high light, low ambient humidity, and completely submerged root/stem but with no soil. Something with a rhizome that would attach to the wood could work well. Any ideas?
Thanks in advance.