So you have your fish tank and a list of fishes you want, now how are you going to decorate your aquarium? Believe it or not, this is where people run into a dilemma and here is where you will find all the answers: 1. Creating a Polystyrene Background: Get a large polystyrene plate and cut it according to your requirement. On the plate paint the background colour you desire to have on your aquarium. Do not forget to apply the Epoxy resin on at least 3 layers! Be careful with this resin because, in addition to the stickiness and strong smell, if not handled well it can cause burn on the fallen parts. Let your decorations dry before installing your aquarium. 2. Add the sand: At this point, you can display your creativity by adding sand and small pebbles at the bottom of your fish tank. 3. Add the plants: You may also choose to add some greens with corals, algae or even some artificial plants. 4. Other elements: Of course, you can also add items of decorations bought in stores or made by yourself, such as statues of monuments or pirate ships!