Slimline 3D aquarium backgrounds are only 15 mm thick. The system consists of 3 different parts: A, B, C . These units can be combined in order to get the necessary length of your aquarium or terrarium tank. The decoration is produced in 4 colors: Basalt Gneiss, Red, Grey Gneiss and White. Slimline backgrounds can be the juwel of any tank design: cichlid, discus, scalars etc.