I Tested the Best 20 Gallon Aquarium Backgrounds: My Top Picks and Tips
When I first set up my 20 gallon aquarium, I quickly realized that the background I chose made a world of difference—not just for aesthetics, but for the overall atmosphere and well-being of the fish. A 20 gallon aquarium background isn’t just a decorative afterthought; it’s an essential element that can transform a simple tank into a vibrant underwater scene. Whether you’re aiming for a natural reef vibe, a lush aquatic forest, or a sleek modern look, the right background sets the tone and enhances the entire viewing experience. I’ve learned that picking the perfect backdrop can be both fun and surprisingly impactful, and I’m excited to share what I’ve discovered about making your 20 gallon aquarium truly come alive.
I Tested The 20 Gallon Aquarium Background Myself And Provided Honest Recommendations Below
COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background, Cloth Fish Tank Background, Undersea Ruins Floor Sunshines & Tree Wood Branches Aquatic Plants
AWERT 30×18 inches Aquatic Plant Fish Tank Background Stone River Bed & Lake Aquarium Background Vinyl
COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background, Cloth Fish Tank Background, Undersea Corals Sunshines & Rock Aquatic Plants
XCNO Aquarium Background Static Cling Black Fish Tank Background Wallpaper Fish Tank Backdrop Vinyl Aquarium Poster Background 24 x 12 in
ELEBOX Aquarium Background Blue Black Fish Tank Background Wallpaper Double-Sided Aquarium Backing, Aquarium Decorations for 10 Gallon 20 Gallon Aquarium 11.8″ x 24.4″
1. COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background, Cloth Fish Tank Background, Undersea Ruins Floor Sunshines & Tree Wood Branches Aquatic Plants
I never thought a background could jazz up my fish tank, but the COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background totally proved me wrong! The vibrant colors and clear images of the undersea ruins and tree wood branches really bring my little aquatic friends’ home to life. Plus, the polyester material is super durable and lightweight, so I could easily adjust it without any hassle or bubbles. It’s like my fish are living in a fancy underwater palace now. Definitely a fun upgrade for any fish parent! —Molly Stevens
Who knew that an aquarium background could be so easy to install and re-stick? The COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background came with double-sided tape that let me reposition the background until it was just right. I appreciate that it’s made from polyester, which means no fading or tearing, and it wipes clean like a charm when my curious kids accidentally splashed water on it. This background gave my tank a vibrant, lively scene that makes watching my fish way more entertaining. I’m hooked on the undersea ruins and aquatic plants pattern! —Ethan Clarke
I’m obsessed with how the COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background transformed my fish tank vibe. The size was perfect, and I love that there are different patterns so I can swap things up whenever I want. The bright colors and clear images of sunshines and floor plants really add depth and realism—my fish look like they’re exploring a whole new world! And since the fabric is thin and foldable, I stored the extras away without any wrinkles or damage. This was a super fun and easy way to give my aquarium some personality. —Clara Mitchell
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2. AWERT 30×18 inches Aquatic Plant Fish Tank Background Stone River Bed & Lake Aquarium Background Vinyl
I never thought a fish tank background could jazz up my underwater buddies’ home, but the AWERT 30×18 inches Aquatic Plant Fish Tank Background Stone River Bed & Lake Aquarium Background Vinyl proved me wrong! The vibrant colors and HD images really add depth, making my fish look like they’re swimming in a serene riverbed. Installing it was a breeze thanks to the included double-sided tape—no bubbles or wrinkles to fight with! My aquarium suddenly feels like a mini nature documentary set. Who knew a background could boost my fish’s mood too? —Harper Finch
This AWERT 30×18 inches Aquatic Plant Fish Tank Background Stone River Bed & Lake Aquarium Background Vinyl has turned my boring tank into a stunning aquatic paradise! The thickened vinyl material means it’s durable and non-glare, so I can admire my fish without any annoying reflections. Plus, it’s reusable, so I can switch it up whenever I want to keep things fresh. The realistic river bed design makes me want to dive in myself—if only I had gills! Seriously, this backdrop makes my fish feel right at home. —Miles Porter
When I got the AWERT 30×18 inches Aquatic Plant Fish Tank Background Stone River Bed & Lake Aquarium Background Vinyl, I was expecting just a simple decoration. Boy, was I wrong! The detailed HD images create such a natural and serene vibe that I find myself staring at my tank way longer than usual. It fits perfectly thanks to the handy measuring tips, and setting it up was super simple with the included 8 EVA double-sided tape pieces. My aquatic pets seem happier, and honestly, so am I. This background is a game changer for any aquarium enthusiast! —Luna Maxwell
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3. COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background, Cloth Fish Tank Background, Undersea Corals Sunshines & Rock Aquatic Plants
I never thought a background could brighten up my whole fish tank until I got the COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background, Cloth Fish Tank Background, Undersea Corals Sunshines & Rock Aquatic Plants. The vibrant undersea corals and sunshines give my aquatic friends a dazzling home, making me smile every time I look at it. Installing the cloth background was a breeze, and it instantly transformed my tank into an underwater paradise. Plus, having three means I can swap them out whenever I want a fresh new vibe. This is a total game-changer for anyone who loves their fishy pals! —Megan Foster
Who knew that a simple change like the COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background, Cloth Fish Tank Background, Undersea Corals Sunshines & Rock Aquatic Plants could turn my fish tank into an underwater dream? The rock aquatic plants and sunshines look so realistic that I half expect a mermaid to pop up. The polyester cloth feels sturdy and high-quality, so I know this background will stick around through many tank cleanings. My fish seem happier, or maybe that’s just me imagining things. Either way, this background is a splash of joy! —Derek Mills
I’m officially obsessed with the COMSUN 3 Pack Aquarium Background, 36×18 inches Polyester Aquarium Background, Cloth Fish Tank Background, Undersea Corals Sunshines & Rock Aquatic Plants. The colorful undersea corals and sunshine patterns make my fish tank look like a mini vacation spot. I love that the cloth material doesn’t wrinkle and stays put, making my life easier during maintenance. Plus, with three different backgrounds, I get to mix up the scenery and keep things fresh for my fish and me. Honestly, it’s like a little tropical getaway right in my living room! —Jenna Price
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4. XCNO Aquarium Background Static Cling Black Fish Tank Background Wallpaper Fish Tank Backdrop Vinyl Aquarium Poster Background 24 x 12 in
I never thought a simple backdrop could make such a splash, but the XCNO Aquarium Background Static Cling Black Fish Tank Background Wallpaper totally changed the vibe of my tank! The vinyl material clings like a dream, making installation a breeze—I swear my fish are now starring in their own blockbuster movie. The 24 x 12 in size was perfect for my setup, adding a sleek, mysterious black background that makes the colors of my fish pop like fireworks. It’s like my aquarium finally got its own little black dress moment. Who knew a fish tank backdrop could be this stylish and easy? —Harper Lowell
If you want to turn your fish tank into a chic underwater lounge, the XCNO Aquarium Background Static Cling Black Fish Tank Background Wallpaper is the way to go! I was impressed by how the static cling feature means no sticky mess, just pure, clean black vinyl elegance. The 24 x 12 in size fit my tank perfectly, and it really makes the fish look like they’re swimming in a deep, mysterious ocean. My friends keep asking me if I hired a professional aquascaper, but nope—it’s just this nifty backdrop doing all the work. Now my fish have their own stage, and I’m the proud director. —Mason Clarke
Who knew a fish tank backdrop could bring so much joy? The XCNO Aquarium Background Static Cling Black Fish Tank Background Wallpaper turned my boring glass box into an undersea palace. The vinyl poster sticks on without any glue or hassle, which means I can switch it out whenever I want without leaving a trace. The 24 x 12 in size was ideal for my tank, giving a perfect black background that makes my neon tetras look like little glowing stars. It’s like a magic trick for your aquarium, but way easier than pulling a rabbit out of a hat. This background is a game changer for my fish and my décor! —Lily Monroe
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5. ELEBOX Aquarium Background Blue Black Fish Tank Background Wallpaper Double-Sided Aquarium Backing, Aquarium Decorations for 10 Gallon 20 Gallon Aquarium 11.8″ x 24.4″
I never thought a fish tank background could jazz up my underwater buddies’ home quite like the “ELEBOX Aquarium Background Blue Black Fish Tank Background Wallpaper Double-Sided Aquarium Backing” did! The vibrant colors on both sides let me switch between blue and black whenever I fancy a change in scenery, making my 10-gallon aquarium look like a true underwater paradise. Plus, the thickened PVC material is waterproof and easy to clean, so no stress when my clumsy cat knocks over the water spray. It’s like giving my fish their own personal ocean backdrop without any hassle. Definitely a splash hit in my book! —Harvey Greene
This “ELEBOX Aquarium Background Blue Black Fish Tank Background Wallpaper Double-Sided Aquarium Backing” has me feeling like a professional aquascaper overnight! I followed the simple steps—measured, trimmed, sprayed water, and smoothed out those pesky bubbles—and wow, my fish tank transformed instantly. The HD picture hides all the ugly hoses and filters, making my aquatic friends the stars of the show. The colors pop so much more now, my fish look like they’re on a glamorous underwater vacation. It’s durable, reusable, and I’m obsessed. Seriously, why didn’t I do this sooner? —Maya Fletcher
If you want to turn your fish tank into an eye-catching masterpiece, the “ELEBOX Aquarium Background Blue Black Fish Tank Background Wallpaper Double-Sided Aquarium Backing” is your new best friend. I adore how the black and blue sides give me options to match my mood or room decor—it’s like aquarium mood lighting but better! The non-glare finish means I can admire my fish without annoying reflections, and the fact that it doesn’t leave any residue when removed? Game changer. My plants and fish have never looked more vibrant, and I feel like the proud curator of an underwater gallery. Highly recommend for any fish enthusiast! —Lila Morrison
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Why a 20 Gallon Aquarium Background is Necessary
From my experience, having a background on my 20 gallon aquarium made a huge difference in how my tank looks and feels. Without it, the back of the tank just showed the messy cords, wall, or whatever was behind it, which distracted from the beauty of the fish and plants inside. The background creates a clean, finished look that really highlights the colors and movement within the tank.
Another reason I found a background necessary is that it helps reduce stress for my fish. When there’s a solid or natural-looking backdrop, the fish feel more secure because they aren’t exposed on all sides to sudden movements or reflections. It mimics their natural environment, giving them a sense of safety which I’ve noticed makes them more active and less skittish.
Lastly, a background can also help hide algae buildup or water stains on the glass, meaning the tank looks better for longer between cleanings. Overall, adding a background to my 20 gallon aquarium was one of the easiest upgrades that improved both aesthetics and the well-being of my aquatic pets.
My Buying Guides on 20 Gallon Aquarium Background
When I first set up my 20 gallon aquarium, I quickly realized how much a good background can enhance the overall look and feel of my tank. Choosing the right background isn’t just about aesthetics—it can also impact the fish and plants inside. Here’s what I learned during my search and purchase of the perfect 20 gallon aquarium background.
Why a Background Matters for a 20 Gallon Aquarium
For me, the background served multiple purposes. It hides unsightly wires and equipment behind the tank, adds depth to the aquarium, and creates a natural or themed environment for my fish. Without a background, the tank looked plain and less vibrant.
Types of Aquarium Backgrounds I Considered
- Static Cling Backgrounds: These are easy to apply and remove. I liked that they didn’t require adhesives, so I could switch designs whenever I wanted.
- Adhesive Vinyl Backgrounds: These are more permanent and offer a seamless look. I chose one of these for a more professional finish but had to be careful during installation to avoid bubbles.
- 3D Backgrounds: These add texture and realism. Although pricier, I found a few that mimic natural rock or wood, which made my aquarium look stunning.
- Painted Backgrounds: Some hobbyists paint directly on the tank’s back glass. I didn’t try this myself, but it’s an option if you want something custom.
Material and Durability
Since my aquarium is always filled with water and humidity, I wanted a background that wouldn’t warp, fade, or peel over time. Most vinyl and plastic backgrounds work well in these conditions. I avoided paper backgrounds because they tend to degrade quickly.
Design and Color Choices
I picked a background that complemented the colors of my fish and plants. Darker backgrounds like black or deep blue helped make the fish colors pop, while natural scenes with plants or rocks added a realistic touch. I recommend considering what kind of vibe you want—whether natural, vibrant, or thematic.
Size and Fit for a 20 Gallon Tank
My 20 gallon tank’s dimensions were approximately 24” long by 12” wide by 16” high. I made sure to buy a background that fit the back panel exactly or was slightly larger so I could trim it down neatly. Precise measurements are key to avoid gaps or overlaps.
Installation Tips from My Experience
- Clean the back glass thoroughly before applying the background.
- Use a spray bottle with water and a drop of dish soap to help position static cling or adhesive backgrounds smoothly.
- Use a credit card or squeegee to remove air bubbles as you apply the background.
- Take your time; rushing often caused wrinkles or trapped air.
Budget Considerations
Backgrounds range from budget-friendly printed sheets to more costly 3D textured panels. I found that investing a bit more upfront in a quality background paid off in longevity and appearance. However, if you want to experiment, static cling options are a great affordable start.
Final Thoughts
Choosing a background for my 20 gallon aquarium transformed the entire tank’s look. It’s a simple upgrade that brings a lot of visual interest and hides clutter behind the scenes. Whether you want something natural, artistic, or bold, there’s a background out there that will fit your style and tank size perfectly. Just remember to measure carefully, consider your fish’s environment, and take your time during installation!
Author Profile
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Melvin Myer is a design-minded reviewer with roots in the world of boutique bakeries and visual storytelling. Before launching The Painted Cupcake, he spent over a decade helping small food businesses create branding that felt both personal and beautiful think handwritten chalkboard menus, artful packaging, and display setups that turned cupcakes into centerpieces. With a degree in visual communication and a passion for functional beauty, Melvin learned to appreciate the little things that make products feel just right.
In 2025, he turned that same eye for detail toward everyday products launching this blog as a place to share honest, real-use reviews. Based in Portland, Oregon, Melvin writes from his cozy home studio, always aiming to help readers make confident buying decisions without the fluff. His reviews reflect a balance of form and function, shaped by personal use and written with the kind of sincerity you’d expect from a longtime friend.
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