Congo Tetra

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingEasy tank upkeep

  No grooming here — steady water quality and routine tank care do it.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment3–5 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Skin conditions

The Congo tetra (Phenacogrammus interruptus) is an African characin endemic to the Congo River basin in the Democratic Republic of the Congo. Larger than most tetras, males reach about 8.5 cm and females around 6 cm, and they live 3–5 years. Mature males develop shimmering rainbow scales and long, feathery fin extensions. Because of their size and activity, Congos need a tank of 150 litres or more with plenty of length. Keep them at 23–28°C in soft, slightly acidic water with a pH of 6.0–7.5, a dark substrate and dense planting with open swimming lanes. They are shoaling fish that must be kept in groups of six or more to feel secure and show their best colour. Congo tetras are omnivores that relish flake, pellets and frozen or live foods like bloodworm and brine shrimp. Peaceful but somewhat shy, they can be nervous with boisterous tankmates and may nip their own long fins if stressed. Sensitive to poor water, their main risks are ich and fin rot; stable, soft, well-filtered water and a calm environment keep them iridescent and healthy.

• How active is a Congo Tetra?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Congo Tetra need?

  Easy tank upkeep. No grooming here — steady water quality and routine tank care do it.

• What tank size does a Congo Tetra need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Congo Tetra a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Congo Tetra live?

  3–5 years. Plan for a long, loving relationship.

• What health issues affect the Congo Tetra?

  Keep an eye out for Ich (white spot), Fin rot, Skin conditions. These are worth raising with your vet, along with any screening they recommend.

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