The Hummingbird Tetra (Poecilocharax weitzmani) is a rare and exquisite nano fish admired for its shimmering, ethereal appearance and peaceful demeanor. At just 1–1.5cm, this micro-species captivates aquarists with its subtle metallic sheen, graceful swimming, and butterfly-like movements—earning its charming nickname. Native to soft, tannin-rich streams in the Amazon basin, this tetra thrives in blackwater-style setups and is best suited for mature, well-maintained aquariums with soft lighting and dense vegetation.

Due to its tiny size and sensitivity to environmental changes, the Hummingbird Tetra is best kept by aquarists with some experience in caring for delicate nano species.

🐠 Key Features:

• Scientific Name: Poecilocharax weitzmani

• Common Name: Hummingbird Tetra

• Size: 1–1.5cm (fully grown adults typically reach 2cm)

• Lifespan: 3–5 years

• Temperament: Peaceful, shy, slow-swimming

• Difficulty Level: Moderate to Advanced

• Origin: Amazon River basin (Peru and Brazil)

• Best kept in groups of 6–10+

🌊 Water Conditions

Hummingbird Tetras are sensitive to water quality and require soft, clean, and slightly acidic conditions:

• Temperature: 24–28°C (75–82°F)

• pH: 5.0–6.8

• Hardness: 1–6 dGH

• Tank Size: 10 gallons minimum (preferably species-only)

• Water Type: Freshwater (blackwater preferred)

• Filtration: Gentle flow with sponge filter or soft outflow

• Lighting: Low to moderate; subdued light enhances their natural iridescence

Add botanicals like Indian almond leaves or driftwood to recreate tannin-rich environments that offer both aesthetic and functional benefits.

🐟 Tank Mates

Due to their small size and shy nature, Hummingbird Tetras are best kept in species-only or ultra-peaceful community tanks.

Ideal companions (if any):

• Chili Rasboras

• Strawberry Rasboras (Boraras naevus)

• Ember Tetras (if gentle and in low numbers)

• Dwarf shrimp (e.g., Amano or Neocaridina)

• Otocinclus (small and calm bottom-dwellers)

Avoid:

• Fast, boisterous fish

• Any larger fish, even peaceful ones

• Aggressive or fin-nipping species

A peaceful environment is essential to avoid stress and ensure healthy behavior.

🍽️ Feeding Habits

Hummingbird Tetras are micro-predators, preferring small live or frozen foods.

Recommended diet:

• Live baby brine shrimp

• Microworms

• Daphnia

• Crushed frozen cyclops or bloodworms

• High-quality micro pellets or powdered flake foods

Feed small amounts 1–2 times daily, ensuring food reaches them before being outcompeted by tank mates.

🧼 Care and Maintenance

• Weekly water changes (15–20%) with minimal disturbance

• Stable parameters are crucial—avoid sudden temperature or pH shifts

• Gentle filtration helps preserve calm water flow

• Tank should be fully cycled and mature before introduction

• Monitor for stress signs such as loss of color or hiding excessively

With proper care and attention, Hummingbird Tetras thrive and become a serene focal point in well-designed nano tanks.

🌿 Why Choose the Hummingbird Tetra?

The Hummingbird Tetra is a rare jewel in the world of nano aquatics. Its delicate movement, glowing appearance, and peaceful nature make it a dream species for hobbyists who appreciate subtle beauty over bold behavior. Ideal for blackwater or aquascaped setups, this fish brings tranquility and elegance to any advanced tank.