I am looking for a plant that I can tie down to a multi tiered rock shelf. The flat sectioned tiers are rough slate. The
LFS only had 1 java fern available, and one of the employees claims there isn't any plant that will grow on a shelf besides the java fern.
My goal is to tie down a plant on both tiers to provide a little more of safe zone for my top dwelling tetras. The Tetras seem to migrate to the corner where the shelf is at night, but hover a few inches above the cliffs.
Any ideas on what I can get besides a Java fern?