3D rocks for aquarium and terrarium decoration will help you to arrange your tank in a creative way. The rocks are easy to install and combine as they can be cut or glued with aquarium silicone together. You can use them both separately to create rocky tank decorations with caves, or in combination with ARSTONE backgrounds. The colours of all the backgrounds absolutely match the colours of the rocks. The rocks can be freely used both for fresh-water or marine aquariums.