Congo Tetra (1.75-2”)

Scientific Name:

Phenacogrammus interruptus

Maximum Size and Lifespan:

• Size: Up to 3.5 inches (9 cm) in males; females slightly smaller

• Lifespan: Typically 4–6 years, but can live up to 8 years with optimal care

Recommended Aquarium Size:

• Tank Size: Minimum of 30 gallons for a small group (6+ individuals); larger tanks (40–55+ gallons) are ideal for stability and swimming space

• Aquascape: Provide planted areas, driftwood, and open swimming spaces

• Lighting: Moderate; enhances iridescence without stressing fish

Water Changes and Care:

• Water Changes: 25–40% weekly

• Temperature: 75–82°F

• pH: 6.0–7.5, slightly acidic preferred

• Filtration: Gentle, well-oxygenated; avoid strong currents

Tankmates:

Congo Tetras are peaceful schooling fish, best kept in groups of 6 or more (preferably 10+).
Compatible tankmates include:

• Other peaceful tetras (e.g., Lemon, Rummy Nose, Emperor Tetras), Rainbowfish, Corydoras catfish, Angelfish, Peaceful barbs (like Cherry Barbs), Gouramis (small to medium species), Small peaceful cichlids like Bolivian Rams or Keyhole Cichlids. With caution larger congo tetras can be kept with geophagus, severums, and other larger semi aggressive cichlids
  

• Avoid:

• Aggressive fish

• Fin-nippers

• Large predators (like Oscars or Arowanas)

Diet:

Congo Tetras are omnivores.

• Pellets: Xtreme nano and nice

• Protein: Frozen brine shrimp, bloodworms, krill

• Plant matter: Spirulina, Community Crave, Krill flakes,
  Feed 1–2 times daily, in amounts they can consume in a few minutes. Fast 1 day to avoid bloating

Overview:

Congo Tetras are known for their shimmering, iridescent bodies and elongated, flowing fins in males. Their vibrant colors and peaceful nature make them a favorite in planted community tanks. They are hardy and adaptable, but thrive best in well-maintained tanks with stable water conditions and a calm environment.

Natural Environment:

Native to the Congo River Basin in Central Africa, particularly in slow-moving tributaries, creeks, and swamps with dense vegetation and leaf litter. These waters are typically warm, soft, and slightly acidic, often stained with tannins from decomposing organic material.

Breeding:

Congo Tetras can be bred in captivity with some effort.

• Sexing: Males are more colorful and have longer dorsal and caudal fins

• Breeding Setup:

  • Use a separate breeding tank with soft, acidic water (pH ~6.5, temp 77–80°F)

  • Provide fine-leaved plants or spawning mops

• Spawning:

  • They are egg scatterers

  • Adults should be removed post-spawning to avoid eating eggs

• Hatching:

  • Eggs hatch in about 6 days

  • Feed Live Baby Brine and crushed flakes/pellets once fry are larger