That looks like an in-tank filter, am I correct?
A black background would definitely help hide the wires, but you'll still be able to see the filter.
I like the scaping as well. It's a great start. I especially like the different levels created, and how you used pieces of some sort of stone to build up a terrace effect. Very neat!
It may help to add more plants to your scape. Anubias nana var. petite would be an excellent addition, since it doesn't mind being tied to wood or stones/rocks. Perhaps some floating plants might be good as well?
Also, from what I've read, when starting up a new planted tank, it's recommended that you plant about 75% to 80% of the tank with plants to outcompete algae for nutrients.
The other thing you can do is put plants in your tank using terra cotta pots. That way, you can fill the pot with laterite or some rich substrate, while still having plants...only downside is that you will limit the plant growth because of the pot.
Anyway, blabbering here, but hope this helps!