Congo Tetra

The (Phenacogrammus interruptus) is a large, elegant freshwater tetra renowned for its shimmering rainbow colours and flowing fins. Native to the Congo River Basin in Africa, this species brings movement, colour, and presence to larger community aquariums.

s are peaceful but active schooling fish that display their best colouration and behaviour in spacious, well-maintained aquariums. When kept in proper groups with compatible tank mates, males develop stunning iridescent hues and extended fin rays that make this species a true centrepiece fish. Physical Characteristics

Adult Size: Approximately 7–9 cm (3–3.5 inches)

Coloration: Iridescent blue, green, gold, and violet tones with translucent fins; males display longer, flowing fin extensions

Body Shape: Slender, elongated tetra profile

Sexual Dimorphism:

Males are larger, more colourful, and develop extended dorsal and caudal fin rays

Females are smaller with shorter fins and softer coloration Behaviour & Temperament

Temperament: Peaceful

Tank Level: Mid to upper water column

Schooling Behaviour: Should be kept in groups of 6 or more

Activity Level: Active swimmer Suitable Tank Mates

Other peaceful medium to large tetras

Corydoras and larger catfish

Peaceful cichlids

Gouramis

Rainbowfish

Avoid:

Fin-nipping species

Very small or timid fish

Aggressive or highly territorial species Breeding Information

Spawning Type: Egg scatterer

Breeding Setup:

Soft, slightly acidic water

Dense plants or spawning mops

Parental Care: None

Notes: Adults may eat eggs; separation required for breeding attempts Special Considerations

Requires ample swimming space

Best colouration achieved with stable water quality and subdued lighting

Flowing fins may attract fin-nippers

Sensitive to poor water conditions compared to smaller tetras Aquarium Requirements

Minimum Tank Size: 150 litres

Water Temperature: 22–28°C

pH Range: 6.0–7.5

Water Hardness: 3–12 dGH

Substrate: Sand or fine gravel

Decor: Live plants, driftwood, shaded areas

Filtration: Moderate, well-maintained

Lighting: Moderate; plants help diffuse brightness Diet & Feeding

Diet Type: Omnivore

Recommended Foods:

High-quality flakes or micro pellets

Frozen foods such as daphnia and brine shrimp

Occasional live foods for conditioning

Feeding Frequency: Once or twice daily in small portions

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