Columbian tetra

Overview

The Columbian tetra (Hyphessobrycon columbianus) is a bold, robust tetra with a silvery-blue body and vivid red fins — a striking contrast that stands out in any tank. Larger and more energetic than the average community tetra, it is hardy and easy to feed, but its size and tendency to nip mean it is best kept in a good group with equally sturdy tankmates.

Tank & water

An active shoal needs at least 110 litres (30 gallons) with open swimming room. Priorities:

• Temperature: hold 23–27 °C with a reliable heater.
• Water: adaptable at pH 5.5–7.5, though soft, slightly acidic water brings out the strongest colour.
• Filtration and flow: they appreciate some current — a good filter keeps the water clean and moving.
• Dark layout: a dark substrate and planted edges deepen their blue-and-red colouring.

Feeding

Columbian tetras are unfussy omnivores with a healthy appetite. Feed a quality flake or pellet staple plus frozen or live foods — bloodworm, brine shrimp, daphnia — and the occasional vegetable-based flake. Feed once or twice a day, only what they clear quickly, to keep water quality high.

Tankmates

Pair them with robust, fast-moving fish that can hold their own: larger barbs, black skirt tetras, zebra danios, rainbowfish and sturdy corydoras. Avoid slow, timid or long-finned fish such as bettas and fancy guppies. A shoal of six-plus is essential — see best community fish for beginners for compatible choices.

Common mistakes to avoid

• Keeping too few, which triggers fin-nipping
• Housing them with slow or fancy-finned fish
• A tank too small for their size and energy
• Sparse decor that leaves them exposed and nervous

Give Columbian tetras space, a large group and robust company, and their flashing red fins make a lively, colourful centrepiece.