How To Install ? Step 1 Keep the glass of fish tank clean and smooth Step 2 Remove the transparent protective film from the background paper Step 3 Spray more soapy water onto the fish tank and background paper Step 4 Use a card to scrape water and small bubbles Why Choose Black Fish Tank Background? Simulate deep water environments - Provide fish with a more natural environment and increase their sense of securityEnhance the viewing experience - A black background can highlight the colors of the fish, making them more vivid and beautiful, while also making the overall appearance of the fish tank more simple and atmosphericIncrease visual depth - Compared to a white background, a black background can increase the visual depth of the fish tank, making the fish and plants inside more vividBeneficial for fish to develop body color - In dark environments, fish's body color will be brighter because it is closer to their native environment Attention: This background paper is only suitable for flat, clean, and smooth surfaces. Do not use it on frosted glass, art glass, cracked glass, and walls, otherwise it may fall off and not adhere firmly Tips: The area with bubbles can be peeled off and sprayed with soapy water again, then slowly scrape out the air and bubbles with force until the bubbles disappear