Thanks, the tank used to have fake coral in it, I hated it finaly after a year I got the driftwood for christmas. The plants are fake I wish I could getting live plants but I realy can't aford better lighting. I was thinking about get a teracota pot and smearing some Aquarium safe silicone on it and sprinkling grabel around it, It would make a nice cave. But it's still missing something I dono what, the fish of course. But I mean decor.
About the backround, my mom thinks the green is nice in the back gives it a natural color, she doesn't like does fake pictures you put behind it. Maybe a green piece in the back would lookd good or blue.