Kyburz Tetra Care Guide – Aquarium Setup, Diet & Breeding

The Kyburz Tetra is a slender South American characin with a silvery to golden body and translucent fins that can show yellow, orange or reddish tones, particularly when the fish is settled and displaying well. Its streamlined shape gives it a lively, open-water appearance, while subtle darker markings may become more noticeable under aquarium lighting or during social interactions.

This species is an active shoaling fish that spends much of its time moving through the middle levels of the aquarium. A group develops a more confident and natural demeanour than a lone specimen, with individuals regularly interacting through brief chases, displays and changes of direction.

In the wild, Kyburz Tetras come from flowing Colombian waters rather than still ornamental ponds. Their natural surroundings can include overhanging vegetation, submerged roots, leaf litter and areas of open water, creating a mixture of cover and swimming space.

Pseudochalceus kyburzi is not one of the most frequently encountered aquarium tetras, and its relative rarity makes a well-maintained group especially rewarding. It is best appreciated as a lively, understated characin whose colours become richer when it feels secure and is kept with suitable companions.

The Kyburz Tetra is native to Colombia in northern South America. It is associated with the Río Magdalena drainage and its connected tributary habitats, where it occurs in warm freshwater streams and smaller rivers.

A group should be provided with at least 80 litres, with a footprint of around 80 × 30 cm or larger to give these active swimmers room to move. Use a dark, fine-grained substrate with areas of dense planting, floating plants, roots and smooth branches to provide shelter, while retaining an unobstructed swimming area along the front and centre of the aquarium. Gentle to moderate flow, clean well-oxygenated water and subdued, broken lighting help recreate the character of their stream habitat. A secure cover is advisable because active tetras may jump.

Up to approximately 6 cm (2.4 inches) in adult total length. Females are usually a little deeper-bodied and may be marginally larger than males.

Kyburz Tetras are omnivorous and should receive a varied diet of quality small pellets or flakes supplemented with frozen or live foods such as brine shrimp, daphnia, mosquito larvae and finely chopped bloodworm. Small portions offered once or twice daily are appropriate, with food sized for their relatively small mouths. Occasional plant-based ingredients can be included as part of a varied feeding routine.

Kyburz Tetras are generally peaceful and can share an aquarium with similarly sized, non-aggressive community fish. Suitable companions include other peaceful tetras, small rasboras, pencilfish, peaceful Corydoras, small loricariid catfish and calm dwarf cichlids. Avoid large predatory fish, fin-nippers and boisterous species that may intimidate them or compete aggressively for food. Very tiny, slow-moving fish and newly hatched fry may be at risk from adult tetras.

Kyburz Tetras are egg-scattering characins, although reliable captive-breeding information is limited because this species remains uncommon in the aquarium trade. A separate breeding aquarium with soft, slightly acidic water, fine-leaved plants or spawning mops, subdued lighting and gentle filtration gives the best chance of success. Adults should be removed after spawning, as the eggs and fry may be eaten. The tiny fry generally require infusoria or another suitably fine first food before progressing to larger foods.

Females are generally fuller through the abdomen, especially when carrying eggs, and can appear slightly larger overall. Males are typically slimmer and may show stronger colour or more intense display behaviour, although the differences can be subtle outside breeding condition.