If you like bonsai tree you might wonder if it is possible to put them in an aquarium. They are small enough to fit some of them after all. The problem off course is that these trees do not survive under water. Although this might be enough to out some people off, with a bit of time and lateral thinking, it is possible to achieve a look which will not exactly include a bonsai in an aquarium but will be stunning none the less. You could also add some artificial plants and decorations. I wrote here about other ways of bringing nature into your home the easy way by using artificial trees.
One way of achieving this is by creating a fake tree using drift wood and adding some plants on the wood to act as leaves. Plants that can be used to achieve this look include moss (Christmas and flame moss) java fern. Anubia petite are also beautiful aquatic plants that will look great in any tank. Off course the downside with going this route is that you do not have an actual tree but I have seen some stunning videos and pictures online and these can be achieved by anyone with a little research about under water plants, time and patience