The tank is pretty nice! I'll give a few constructive scaping comments though..
Too many different rocks! Ditch the River rock, doesn't go at all
. Then move the rock to the left of where the river rock was to the right about... 1 inch? So it isn't like just off center but is a little bit more..
Maybe, I would even do this. See the picture? It looks like the space between the river rock and the other rock the other rock could go right into that space, I think that could give it a really nice feel then either leave the little part in the front left hand corner bare or put a low carpet of something in. I think that would make the tank look bigger.
Besides that I really like the tank, the two main rocks have nice color and add some nice texture to the tank as well.
I'll be watching!
-Andrew