CeramicNature back wall aquarium  This rear wall has a beautiful natural look. They are the ideal back walls for the aquarium and terrarium. The back walls have a polyester base with a hard top layer of special and unique mineral resins. This makes the top layer rock-hard and the back wall safe for animals, humans and nature.  All back walls are just a bit smaller than the aquariums. This so that it always fits. To fill up the remaining space, gauze is supplied to attach to the sides. This way the water can flow through but the fish and other inhabitants can't!   Pattern and shape may vary slightly.  Specifications: Colour: grey Gender: unisex Material: polyester, mineral resin Length rear wall: 47.5 cm Width rear wall: 26.5 cm Length suitable aquarium: 50 cm Width suitable aquarium: 30 cm Suitable for: aquarium and terrarium