Tetra / Aquarium Zone · Ballina
Phenacogrammus interruptus
A peaceful community fish. Grows to about 7 cm and suits a tank of 150 litres or more.
The fish, up close
The Congo Tetra (Phenacogrammus interruptus) is a stunningly beautiful freshwater fish known for its iridescent colours and peaceful demeanor. These tetras have elongated bodies with a shimmering blue-green colouration that extends from their head to their tail. Their fins are adorned with striking red and yellow accents, adding to their overall visual appeal. Congo Tetras are schooling fish that thrive in a well-planted aquarium with ample swimming space. They are best kept in groups of at least six individuals to showcase their natural shoaling behaviour.
Care guide
Use these notes to shape a setup around the fish, then speak with our team about the tank you have in mind.
Plan your setupBehaviour
Congo Tetras are peaceful and social fish that do well in community aquariums with other non-aggressive species. They are active swimmers, often darting around the tank in a synchronised manner when kept in a group. Males may display minor territorial behaviours towards each other, but overall, they are not known to be aggressive.
Tank planning
Maintaining stable water parameters is crucial for the health of Congo Tetras. They prefer slightly acidic to neutral water with a temperature range of 24-28°C. Providing a well-vegetated tank with open swimming areas mimics their natural habitat in the rivers of Central Africa. Regular water changes and a good filtration system are essential to keep the aquarium clean and maintain optimal water quality.
Practical details
Questions
For a specific fish, current stock or a tank setup question, speak with the Aquarium Zone team before travelling.
Contact the storeAquarium Zone regularly helps customers find freshwater fish in Ballina and across the Northern Rivers. Stock changes week to week, so contact the store before visiting if you are looking for Congo Tetra.
Yes. Bring your tank size, current fish list, setup photos, and any water test results so the team can help with compatibility, stocking, and care advice.
Congo Tetra is listed with this tank recommendation: A minimum tank size of 80 litres is recommended for a small group of Congo Tetras. However, larger tanks exceeding 150 litres are preferable, especially for larger shoals or when keeping them with other tank mates. Providing ample hiding spots and plant cover will help reduce stress and create a more natural environment for these fish. Ask in-store for advice based on your exact setup and tank mates.
Yes. Aquarium Zone serves aquarium hobbyists from Ballina, Lennox Head, Alstonville, Wollongbar, Bangalow, Byron Bay, Lismore, Evans Head, Mullumbimby, Casino and the wider Northern Rivers.
Aquarium Zone / Ballina
Looking for Congo Tetra? Contact us to confirm current availability and discuss whether it suits your aquarium before making the trip.
18 Southern Cross Drive
