What size tank does a Congo Tetra need?

Congo Tetra needs a minimum of 30 gallons, with 55 gallons recommended. They are middle swimmers. Keep in groups of 6+.

Is Congo Tetra good for beginners?

Congo Tetra is rated "intermediate" difficulty (2/5). Great for beginners.

What fish are compatible with Congo Tetra?

Congo Tetra is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6-7.5, temp 75-81°F).

Congo Tetra

Phenacogrammus interruptus

Family: Alestidae • Origin: Africa

Congo Tetras are the royalty of the tetra world. Males display iridescent rainbow colors and flowing fins. They need space but reward you with a spectacular display.

Min Tank

30 gal

Max Size

3.5"

Temperature

75-81°F

6-7.5

Lifespan

5 years

School Size

Swim Level

middle

Hardness

3-12 dGH

peacefulintermediateomnivoreschooling

Is Congo Tetra Right for Your Tank?

Congo Tetra is an excellent choice for beginners — rated "intermediate" difficulty (2/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. A 30-gallon tank minimum is standard — most community setups will accommodate them.

With a peaceful temperament, Congo Tetra makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 6 together, or they may become stressed and display abnormal behavior. Expected lifespan: 5 years with proper care.

Common Mistakes with Congo Tetra

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Keeping fewer than 6 together

Congo Tetra is a schooling species — they need a group of at least 6 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Relying on a heater without a thermometer

Congo Tetra needs 75–81°F. Heaters malfunction or drift over time — always use a separate thermometer to verify. Temperature swings of even 3–4°F can trigger stress and disease, particularly ich.

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Putting them in a tank under 30 gallons

Many beginners underestimate tank size needs. Congo Tetra requires at least 30 gallons — ideally 55. Cramped tanks lead to stunted growth, aggression, and poor water quality.