Tank backround help!!!

[Mmclaughlin09]

So I have a fish tank I started with a mirror backround. What can I do to get a different backround without draining the tank and making a 3d one!!

 

[fort384]

You can use blue or black backgrounds that attach to the outside rear of the tank. They are available at most of the chain pet stores. They make ones with photos on them too, but those are cheesy imo.