You know I was thinking riccia, or some other type pf moss... thinking of doing a moss mesh.... taking 2 pieces of mesh (or one piece of mesh and one piece of net) and sandwiching the riccia, moss, etc etc in between to get a carpet, then planting my driftwood... so really, there wont be any substrate at all in the tank... heres what Im thinking...

can anyone tell me what the plant is on the driftwood in this pic?
Ive read that shrimp like to devour riccia and other mosses? should I rethink putting RCS in this tank?
**edit**
I will also be painting the back and both sides of the tank black to enhance the colors of the plants and fish.