Aquadecor Laminated Rocks aquarium backgrounds can be used to mimic a perfect natural habitat of sedimentary rocks with any freshwater species. We recommend laminated rocks aquarium backgrounds (B models) for smaller, medium-sized and larger fish tanks. B models come in several pieces for an easy and simple 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 aquarium background can be made in any color.