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Congo tetra, photographed on a transparent background

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Congo tetra

Phenacogrammus interruptus

The showiest tetra; the male trails a feathered tail fringe as he swims.

The Congo tetra (Phenacogrammus interruptus) is a tropical freshwater fish of the family Alestidae. It swims in midwater, close to the bottom. Adults grow to about 8.5 cm. In the aquarium it needs a tank at least 120 cm long and water at 23–27 °C.

Size
8.5 cm
Smallest tank
120 cm
Temperature
23–27 °C
Care
Moderate

In the aquarium

Temperature23–27 °C
pH6.0–7.5
Hardness1–12 °dGH
Temperament
Peaceful
Diet
Omnivore
Activity
Busy
Water layer
Mid water
Group
Happiest in a group of 8 or more
Plants
Eats plants
Drawn to scale in a 120 cm tank

These values are compiled from real species data, and the LumaReef simulation is built to keep them true to life.

Which tank it fits

  • Nano60 cm · 65 litresToo small
  • Standard90 cm · 180 litresToo small
  • Wide120 cm · 300 litres33 of them
  • Living room180 cm · 650 litres72 of them
  • Showcase250 cm · 1,200 litres133 of them
  • Gallery300 cm · 1,440 litres160 of them

Who it lives with

In the wild

Water type
Freshwater
Climate zone
Tropical
Habitat
Midwater, close to the bottom
Aquarium trade
Traded commercially

Conservation status

Classification

  1. OrderCharaciformes
  2. FamilyAlestidae
  3. GenusPhenacogrammus
  4. SpeciesPhenacogrammus interruptus
  5. Described byBoulenger, 1899

In other languages

German
Kongosalmler
Russian
Радужная тетра
Chinese
斷線脂鯉

Quick answers

Congo tetra size: how big does it get?
Adults reach about 8.5 cm. Record sizes among the 7 Alestidae species on LumaReef: 3.1 cm (Jellybean Tetra) to 133 cm (Goliath Tigerfish).
Congo tetra tank size: what is the minimum?
A tank at least 120 cm long. In LumaReef that is the Wide tank or larger.
Congo tetra water parameters: what does it need?
Temperature 23–27 °C, pH 6.0–7.5, hardness 1–12 °dGH. Close to what most Alestidae on LumaReef need (22–26 °C).
Congo tetra tank mates: what can it live with?
It gets along with 65 of the 99 freshwater species in the catalogue, such as Scissortail rasbora, Molly, and Dwarf gourami.
Congo tetra: alone or in a group?
Keep at least 8 together.
Congo tetra and plants: is it plant safe?
No, it may eat or uproot plants.

All Alestidae speciesAll species A–Z

Sources

Congo tetra: compiled from these references.