Rocks
One of the most natural way to make a rock background is to use real rocks. Many people have made backgrounds using real rocks and they have turned out awesome! Careful with real rocks as they do make a very heavy tank background!
Here are some photos of some tanks that utilize real rocks as there background!
106_1791 by nickerson_kevin, on Flickr
106_1793 by nickerson_kevin, on Flickr
106_1821 by nickerson_kevin, on Flickr
106_1850 by nickerson_kevin, on Flickr
Here is a build by dendroboard user Cairo11 that utilizes lava rocks! This would make it not quite as heavy as the previous example.
Have you ever had a tank with real rocks? How’d it turn out?
The Frog Lady 
Lovely backgrounds! When I was a kid, my family had a frog tank with rocks, but never as a background like that.
Fun! What kind of frog did you have? I would always try to get my parents to allow me to keep some of the leopard frogs from my cabin as a child but they always went to live in the pond instead.
Nice
Thanks for stopping by!
Fascinating! I’d love to have cause to do something like that!
I wish I had more opportunities to create tanks as well! Too bad I am starting to run out of room!
Backgrounds made with real rocks always look awesome.
yeah! They just get sooooo heavy soooo fast! My first tank had real rocks as the drainage layer and that was a beast to move.