Hey I made a custom background for the aquarium, I know it will never be possible to put it into the aquarium, but I had nothing to do and when I saw this coralpics by James I had do to this
Here is the link to where you can see it:
http://www.deviantart.com/deviation.php?id=345155
I downloaded a bunch of pics and then I started creating a reef, piece by piece, first I made two rockhils (it was really hard to find coralrock-pics), then I put in the big shell and then the corals. That was a lot of work.
I like the result, it has the same style as the original background I think. What do you think of my reefbackground?