a real easy way to change the appearance would to make the sand uneven. maybe on the far right side make it an inch or two deeper, a slight slope. IMO, uneven substrate gives a more natural appearance.
the tank is pretty tall. i like the red flame sword. but i woula also att a tall piece of DW in the back of the tank.
There are 2 types of people on this forum. Those that have algae, and those that lie and say they don't.