Best Nano Tropical Fish for Small Aquariums

Looking to create a beautiful, vibrant aquarium without the need for a large setup? Nano tropical fish are the perfect choice. At Byrkley Aquatics, we specialise in small, colourful, community-friendly species that are ideal for compact aquariums.

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Best Nano Tropical Fish for Small Aquariums

Looking to create a beautiful, vibrant aquarium without the need for a large setup? Nano tropical fish are the perfect choice. At Byrkley Aquatics, we specialise in small, colourful, community-friendly species that are ideal for compact aquariums.

Whether you are a beginner starting your first tank or an experienced aquascaper looking for the perfect finishing touch, these diminutive fish offer incredible character and activity. Below, we explore the best nano fish to help you choose the right additions for your home ecosystem.

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What Are Nano Tropical Fish?

Nano fish are small, freshwater species that typically reach a maximum size of 1–4cm. Despite their tiny stature, these "miniature marvels" are packed with personality and vibrant colour, making them the perfect inhabitants for nano tanks (typically those under 60 litres).

These species are particularly well-suited to lush, planted aquascapes, desktop setups, or compact home aquariums. Most nano fish are peaceful by nature, thriving in shoals or as part of a carefully selected community environment.

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Popular Nano Fish

  • Neon Tetras
  • Ember Tetras
  • Galaxy Rasboras (Celestial Pearl Danios)
  • Chili Rasboras
  • Pygmy Corydoras
  • Endler's Livebearers
  • Dwarf Gourami
  • Male Betta (in solo tanks or with care)
Read About The Top 10 Nano Fish

Best Tanks for Nano Fish

When choosing a tank for nano tropical fish, it’s important to provide stable water conditions, gentle filtration, and the right size for your fish population.

> 20 L

Recommended Tank Size Minimum

  < 40 L

Recommended Tank Size Maximum

Why Choose Nano Fish?

✔ Perfect for small spaces – Ideal for desks, kitchens, and flats
✔ Low energy use – Smaller tanks use less power and water
✔ Ideal for aquascaping – Nano tanks let your creativity shine
✔ Easy to maintain – Great for beginners and children
✔ Affordable to set up – Smaller setups cost less to start and run

Shop Tanks
Kubus Cube 10L Aquarium Black

Perfect for small aquascapes, shrimp setups, or as a desk display. Its minimalist cube design provides clear viewing from all angles, allowing your aquascape or livestock to take centre stage.

Kubus Cube 15L Aquarium Black

Designed for nano aquascapes, shrimp tanks, or elegant planted displays, its minimalist cube form provides crystal-clear viewing from every angle, showcasing your aquatic world in stunning detail.

Betta Tank Fluval Premium Kit 22L

This all-in-one setup includes efficient filtration, soft water movement, and subtle lighting—everything needed to create a stress-free, stylish Betta habitat.

Current available Tropical fish accurate as of 03 July 2026, however please contact us to confirm availability before travelling.

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Tetras

  • Axelrodi Riesei - Ruby Tetra
  • Amandae Tetra
  • Red Phantom Tetra
  • Cardinal Tetra (Lg)
  • Rummy Nose Tetra
  • Black Neon Tetra
  • Congo Tetra
  • Lemon Tetra
  • Neon Tetra
  • Serpae Tetra

Bottom Feeders & Catfish

  • Corydoras Sterbai
  • Bronze Corydoras
  • Panda Corydoras
  • Otocinclus Affinis
  • Bristlenose Pleco
  • L144 Lemon Pleco
  • Whiptail Catfish
  • Kuhli Loach
  • Julii Corydoras

Rasboras & Danios

  • Harlequin Rasbora
  • Zebra Danio
  • Leopard Danio
  • Celestial Pearl Danio
  • Chili Rasbora
  • Lambchop Rasbora
  • Giant Danio
  • Pearl Danio

Shrimp & Inverts

  • Cherry Red Shrimp
  • Amano Shrimp
  • Jade Shrimp
  • Blue Velvet Shrimp
  • Assorted Nerite Snails
  • Assassin Snail
  • Yellow Rabbit Snail