There are many different aquarium decorations out there There are hundreds if not thousands to choose from Coral driftwood gravel plants artificial plants rocks and ceramic decorations are just a few types of aquarium décor So once you have decided on your theme you should have no trouble filling your tank You will want to make sure you put all the smaller objects and plants in the front and arrange the larger ones towards the back so it can all be seen It should be noted that you should only put articles in your aquarium that are labeled for use in aquariums so as not to contaminate the tank Driftwood rocks and plants from your garden or elsewhere may contain harmful ingredients like pesticides or chemicals and even minerals that can be toxic to the aquarium life