Combine our black and blue fish aquarium background with different fish tank decorations. It will make your aquarium theme even more stunning. This Fish tank stickers is self-adhesive. Not only does it stick firmly, but it can also increase the explosion-proof performance of the fish tank. Fish Tank Poster is made from Premium PVC. It can hide ugly hoses, cords, tubes, filters and pumps behind this aquarium wallpaper. it is waterproof, non-glare, not easy to fade and durable. Several sizes of background posters fit most tank. Include 27.6"x 11.8", 39.4" x 15.7", 51.2" x 19.7", 70.9" x 23.6". Installation instructions for the aquarium background sticker. 1. Please choose the length and height of the background must longer than the length and height of your fish tank. 2. Clean the fish tank with water to keep the surface free of dust. 3. Remove the transparent protective film from the surface of the fish aquarium background. And spray a large amount of water on the background. 4. Use cards to scrape out bubbles and water droplets. 5. Trim the background beyond the aquarium.