Thanks for the mention guys.
Here is an example of one of my old s/a tanks.
A set up like this works well with the less destructive or juvenile cichlids.
This tank housed angels and young geos amongst others.
I would stick with the sand but add debris.
By this I mean twigs,stones,leaves and the odd handful of gravel.
This will make your sand look less uniform and a lot more natural.
Another area where tanks fail is not making full use of the height if the tank.
I attach branches to the brace bars and let them hang over the substrate.
I also rarely use uniform lighting.What I mean by that is I leave some areas dark and some parts well lit.
If using fluorescents, I put tin foil under part of the tube to create low light areas.It creates atmosphere and gives the look more interest.
Another tip is avoid symmetry and have an informal feel to the placement of key decor items.
Always hide heaters and intakes.Cover them with a branch or a rock. They always spoil the look if a natural scape if they are right there on show.
Never use plastic plants if you want a natural look.In my opinion better to have no plants at all.They rarely look convincing to me.
The other big thing to get right is scale.
The tank above works fine for medium and smaller fish. Big fish however would not quite fit such an intricate scape.
Bigger fish need bigger decor to look in balance with the scene.
While this tank is still quite well furnished the scene is less busy with smaller decor items than the previous tank.
As the fish in the video below are bigger the scene is less busy and the fish them selves become much more part of the display.