Congo Tetra

Overview

The Congo Tetra (Phenacogrammus interruptus) is a larger, shimmering African tetra whose males develop beautiful flowing fins with iridescent blue, gold, and orange hues. A showpiece species for larger community tanks.

Water Parameters

• Temperature: 23–27°C (73–81°F)
• pH: 6.0–7.5
• Hardness: 4–12 dGH

Tank Setup

• Minimum tank size: 120 litres for 8+
• Substrate: Dark sand or gravel to enhance iridescence
• Decor: Planted with generous open swimming space; floating plants for shade

Diet

• Base: Quality flake, granules
• Treats: Frozen bloodworms, brine shrimp, daphnia
• Frequency: 2 meals daily

Temperament & Tank Mates

• Temperament: Peaceful, active schooling fish
• Best companions: Other medium-sized peaceful fish — rainbowfish, larger tetras, gouramis, corydoras
• Avoid: Fin-nippers (tiger barbs); they will damage the Congo's flowing fins
• Schooling: Minimum 8

Breeding

• Difficulty: Moderate; scatter spawner
• Process: Soft, acidic water; fine-leaved plants; remove parents

Common Issues

• Flowing fins may be nipped by boisterous tank mates
• Can jump when startled; secure lid essential
• Lifespan: 3–5 years