If you want to create a breathtaking piece of nature that will leave everyone in awe, then these massive rocks aquarium backgrounds with deep cracks and caves are perfect for you. Due to their accentuated 3D effect, they take up slightly more space than other types of backgrounds, which is why we recommend them for aquariums of larger dimensions. Massive rocks aquarium backgrounds come in several pieces for a simple and easy setup and need to be glued to the glass using silicone for aquariums. They can be accompanied by the bottom and overhanging rocks in the same design and color. Each background can be made in any color.