Setting up a thriving nano tank can be challenging, especially when choosing the right plants. Small spaces demand plants that won't outgrow their environment quickly, and require minimal maintenance to keep the tank healthy and aesthetically pleasing. This article highlights the best aquatic plants for nano tanks under 5 gallons, focusing on species that are compact, low-maintenance, and visually appealing. We'll explore a range of options, from fine-textured grasses to vibrant, colorful additions, ensuring your miniature aquarium flourishes without overwhelming the space.These carefully selected plants offer diverse textures, colors, and growth habits, allowing you to create a stunning and balanced aquascape within a confined area. Whether you're a seasoned aquascaper or a beginner, this guide will provide valuable insights into choosing plants that thrive in the unique environment of a nano tank, offering solutions for easy setup and long-term maintenance. We'll cover everything from planting techniques to selecting compatible species to ensure a flourishing and beautiful underwater world.
Pros And Cons
- Tolerates low light
- Variety of colors
- Unique leaf structure
- Can cause algae growth if too much light is provided.
- Versatile, can be used in many ways
- Fun to incorporate into designs
- Tiny size
- Slow-growing
- Can be attached to hardscape, no planting required
- Good for beginners
- Fine texture
- Suitable for low-light, low-CO2 tanks
- Slow-growing, requiring minimal maintenance
- Tends to pop up out of the substrate
Read more: Best 3 Plastic Anubias Aquarium Plants
Micro Sword (Lilaeopsis brasiliensis)
Micro Sword is a popular choice for its fine, grassy texture. It's ideal for low-light, low-CO2 setups typical in nano tanks, requiring minimal maintenance. However, it can sometimes pop out of the substrate, requiring careful planting and potentially using hardscape to hold it in place.
I recommend using hardscape like serious stone or dragon stone to wedge the plants in place until their roots establish in the substrate. This helps prevent them from popping up and keeps the look tidy.
While it won't carpet like in larger tanks with higher light and CO2, its slow growth is a benefit for nano tanks, minimizing maintenance needs.
Crypt Parva
Crypt Parva is a miniature crypt perfect for tiny tanks, offering adorable texture and a slow growth rate. It complements Micro Sword well due to their similar textures and growth habits.

Its compact size prevents it from overwhelming the small space, unlike larger Crypt species. I've found the combination of Micro Sword and Crypt Parva creates visually appealing contrast and texture in nano tanks.
This plant's small size and manageable growth make it a great choice for low-maintenance nano aquascapes.
Bucephalandra
Bucephalandra thrives in low-light conditions, making it an excellent choice for nano tanks. Its various colors and leaf shapes add visual interest to the scape.
There's a wide variety of Bucephalandra available, offering diverse colors like greens and reds. I plan on making a separate video to cover the different types.
This low-maintenance plant tolerates low light conditions and adds vibrant color contrast to a miniature aquarium.
Anubias Nana Petite
Anubias Nana Petite is a favorite due to its incredibly small size and slow growth. It's easily attached to hardscape, offering flexible placement options.

Its tiny leaves provide excellent texture and can be arranged in many ways, creating interesting visual effects. Attaching them to driftwood, rocks, or even wedging them in between rocks makes them versatile.
The slow growth and ease of care makes it ideal for both beginners and advanced aquascapers.
Anubias Nana (or Gold Coin)
Anubias Nana and Gold Coin Anubias are larger than the Petite variety but still suitable for smaller tanks. They grow well both in and out of water.
They can grow immersed, provided the rhizome stays underwater. This makes them suitable for open-top tanks or water gardens.
Combining Anubias Nana Petite with Anubias Nana or Gold Coin adds varied leaf sizes and textures, creating a visually interesting contrast within the nano tank.
Bonus: Moss Balls
Moss balls are fun and versatile additions to nano tanks. Their spherical shape adds visual interest, and they can be used creatively within the scape.

They can be placed directly in the substrate, wedged between rocks, or even attached to other hardscape elements. There are many ways to incorporate them into the design.
They’re a fun addition for both beginners and experts alike, and provide a textural contrast to leafy plants.