What kind of backgrounds are you guys using?

[RobTheCableGuy]

I printed out pictures of the kids and taped them to the back of the tank, but i just removed them because the pictures were over a year old and now im looking for a new background

 

[N©KI]

I'm considering creating a "moss Wall" on the back of my tank.
http://www.nature-aquarium.com/xmas.htm
It's cheap, easy and better looking than prefab backgrounds.

 

[fairladyZ]

i using a back ground with green plants all the way & my goldfish sometimes thought it real & will nibble at the glass lol