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Congo Tetra 4cm

The Congo Tetra 4cm is a young, shimmering African tetra known for its flowing fins and rainbow iridescence. Best kept in a good‑sized, planted community aquarium, the Congo Tetra 4cm really shines in a peaceful group with gentle flow and soft, slightly acidic water. The Congo Tetra 4cm is a juvenile of one of the most striking schooling tetras in the hobby. Originating from the Congo River basin in Africa, these fish develop long, flowing fins and a beautiful, shimmering body that reflects blues, violets, golds and greens under good lighting. At around Congo Tetra 4cm, they are still growing and colouring up, but already show the elegant shape and schooling behaviour that make them such a standout in larger community aquariums. Appearance & Behaviour of Congo Tetra 4cm The Congo Tetra 4cm has: A slender, elongated body with a slightly deeper mid‑section Iridescent scales that develop strong rainbow tones as they mature Long, flowing fins in males, with trailing dorsal and tail fin extensions Calm, active schooling behaviour – happiest in a group of 6+ When kept in a proper group, the Congo Tetra 4cm will cruise the mid‑to‑upper water column, flashing colour as they turn in the light...

$12.00

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Click & CollectAvailable from Newmarket, Brisbane.

Congo Tetra 4cm$12.00

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Click & CollectCollect from Newmarket, Brisbane.

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Everything you need to know

The Congo Tetra 4cm is a young, shimmering African tetra known for its flowing fins and rainbow iridescence. Best kept in a good‑sized, planted community aquarium, the Congo Tetra 4cm really shines in a peaceful group with gentle flow and soft, slightly acidic water.

The Congo Tetra 4cm is a juvenile of one of the most striking schooling tetras in the hobby. Originating from the Congo River basin in Africa, these fish develop long, flowing fins and a beautiful, shimmering body that reflects blues, violets, golds and greens under good lighting.

At around Congo Tetra 4cm, they are still growing and colouring up, but already show the elegant shape and schooling behaviour that make them such a standout in larger community aquariums.

Appearance & Behaviour of Congo Tetra 4cm

The Congo Tetra 4cm has:

A slender, elongated body with a slightly deeper mid‑section
Iridescent scales that develop strong rainbow tones as they mature
Long, flowing fins in males, with trailing dorsal and tail fin extensions
Calm, active schooling behaviour – happiest in a group of 6+

When kept in a proper group, the Congo Tetra 4cm will cruise the mid‑to‑upper water column, flashing colour as they turn in the light and creating a stunning display in planted or blackwater‑style setups.

Tank Requirements for Congo Tetra 4cm

To keep the Congo Tetra 4cm thriving and showing its best colours:

Tank size: A minimum of ~90–120L, with more space preferred for a decent school
Aquascape: Planted tank with open swimming areas and some shaded zones
Substrate: Darker substrates help enhance their iridescence
Water movement: Gentle to moderate flow, not too harsh on their fins

Water parameters (general guide):

Temperature: around 24–28°C
pH: roughly 6.0–7.5, stable and well‑maintained
Clean, well‑filtered water with regular partial water changes

Good lighting over plants and darker backgrounds will help the Congo Tetra 4cm develop richer colour and a more metallic sheen as it matures.

Tank Mates for Congo Tetra 4cm

The Congo Tetra 4cm is generally peaceful and well suited to calm community tanks:

Great with other peaceful tetras, rasboras, rainbowfish of similar size, and gentle cichlids
Compatible with Corydoras, smaller plecos and other non‑aggressive bottom dwellers
Avoid fin‑nippers and very boisterous species that may damage their flowing fins

Because they are schooling fish, always keep Congo Tetra 4cm in a group – more individuals will mean less stress, better colour and more natural behaviour.

Feeding the Congo Tetra 4cm

The Congo Tetra 4cm is not fussy, but benefits from a varied, high‑quality diet:

Quality tropical flakes and micro pellets as a staple
Frozen and live foods such as brine shrimp, daphnia and bloodworm to enhance colour
Occasional treats like insect‑based foods to mimic their natural diet

Feeding small amounts 1–2 times per day will keep your Congo Tetra 4cm active, healthy and brightly coloured.

Perfect Centrepiece Schooling Fish

For aquarists wanting a showy, active school in a larger community tank, the Congo Tetra 4cm is an excellent choice:

Adds constant movement and shimmer to the mid‑water
Pairs beautifully with planted and blackwater‑inspired aquariums
Peaceful nature makes them easy to combine with other community species

Given time, good food and stable water, a group of Congo Tetra 4cm will mature into a truly eye‑catching display.

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