10 Unique Aquarium Decoration Ideas to Inspire Your Creativity

A beautifully decorated aquarium can be any room's centerpiece, providing relaxation and entertainment for everyone around it. Elevate your aquarium from a simple fish habitat to an underwater wonderland with these ten unique decoration ideas to wow your guests and make your fish feel at home.

1. Create an Underwater Garden

Adding live plants can completely transform your aquarium. Choose various aquatic plants, such as Anubias, Java Fern, and Vallisneria, to create a lush, green underwater paradise. Position tall plants towards the back of your tank and smaller ones in the front to create depth. Combine plants with different leaf shapes and colors to enhance the visual appeal.

2. Design a Rocky Landscape

Incorporate stones and rocks of different shapes, sizes, and colors to replicate a natural rocky habitat for your fish. Stack them to form caves, canyons, and cliffs, or lay them flat to create caves and ledges. Be creative, but secure the rocks properly to prevent any accidents. Always remember to use aquarium-safe rocks, like slate, lava rock, or Texas holey rock.

3. The Sunken Shipwreck Theme

Create a sunken shipwreck scene to give your aquarium a mysterious, adventurous vibe. You can find various shipwreck decorations in aquarium stores, ranging from small vessels to large, intricate pirate ships. Complement the shipwreck with seashells, treasure chests, or broken pottery to add realism and create a stunning visual experience.

4. The Ancient Ruins Theme

Transport your fish and viewers back in time by designing an ancient ruins-themed aquarium. Use ornaments like broken columns, temple facades, and mystical statues to bring the beauty and mystery of lost civilizations to your aquarium. You could also include some replica artifacts to add a touch of authenticity to your ancient ruins setup.

5. Build an Underwater Cityscape

Construct a mini underwater cityscape with miniature buildings, bridges, and roads. You can purchase pre-made aquarium-safe cityscape ornaments or use your creative skills to craft them yourself. Combine your underwater city with live plants and rocks to naturally contrast the urban scene.

6. An Enchanted Fantasy Forest

Create a fantastical realm for your fish by recreating an enchanted fantasy forest in your tank. Use driftwood, moss, and plants like Java Moss, Willow Moss, and Christmas Moss to build an environment that looks straight out of a fairy tale. Add figurines of mystical creatures such as fairies, dragons, or unicorns to complete the magical scene.

7. Convert Your Tank into a Movie or TV Show Scene

Showcase your love for your favorite movie or TV show by mimicking famous scenes or landscapes within your aquarium. The possibilities are endless, from recreating Atlantis or the Finding Nemo scene to setting up a SpongeBob SquarePants-inspired Bikini Bottom. However, make sure to use aquarium-safe materials and ornaments to avoid harming your aquatic friends.

8. The Zen Garden Aquarium

Introduce a sense of tranquility and harmony to your tank by designing a Japanese-inspired Zen garden. Incorporate elements like smooth rocks, sand, and minimalist decorations that evoke a calm atmosphere. Consider adding a small Buddha statue or a pagoda ornament to bring an authentic Zen feel to your aquarium.

9. The Volcanic Underwater World

Build an extraordinary and fascinating volcanic underwater world using lava rocks, dark-colored gravel or sand, and fiery-colored plants. Purchase an aquarium-safe volcano decoration with an air stone to create a bubbling volcanic effect, enhancing the overall volcanic ambiance.

10. Marimo Moss Ball Ecosystem

Create a unique and enchanting environment with a Marimo moss ball ecosystem. Marimo moss balls, a species of filamentous green algae, look otherworldly and require minimal maintenance. Use a spacious glass container such as a bowl or vase and add sand or pebbles and a few Marimo moss balls. Decorate with small figurines or rocks to complete the simple yet captivating setup.


Decorating your aquarium is an opportunity to showcase your creativity and provide your fish with an exciting and comfortable habitat. Explore various themes, from natural landscapes to fictional worlds, and take inspiration from these ten unique ideas to create a captivating aquarium. By tailoring your underwater wonderland to your preferences, you can enjoy a stunning, personalized space that you and your aquatic friends will adore.

For all your aquarium accessories needs, Splashy Fish has everything you need to set one up! From fish to feeds, plants to other supplies, you can find what you need from our shop. See what we have to offer!