Buenos Aires Tetra
Psalidodon anisitsi
The Buenos Aires Tetra is a large, energetic, and highly adaptable schooling fish notorious for its voracious appetite for live aquatic plants.
Ideal Conditions
- Temperature
- 16 – 28 °C
- pH range
- 6 – 8
- Hardness
- 5 – 20 dGH
- Adult size
- 6 – 7 cm
- Standard 120L aquarium
- 120 litres+
- Lifespan
- 5 – 6 years
- Diet
- Omnivore
- Water flow
- moderate
- Preferred setup
- Hardscape-focused with driftwood and smooth rocks. Use only extremely hardy plants like Anubias or Java Fern, as they devour soft foliage.
About the Buenos Aires Tetra
Originally hailing from the varied waterways of South America, the Buenos Aires Tetra is one of the hardiest tetras available in the hobby. Growing up to 7 cm, it boasts a robust silver body accented by a distinct black diamond at the tail base and striking reddish fins. While its hardiness makes it incredibly appealing, its boisterous nature and penchant for plant destruction mean it requires a carefully planned setup rather than a standard planted community tank.
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Where Buenos Aires Tetra comes from
Native range
Paraná River Basin, Uruguay River Basin
Countries / regions
Argentina, Brazil, Paraguay, Uruguay
Habitat
Found in a vast array of habitats ranging from clear, flowing streams to murky ponds and lakes.
Their wide geographical spread exposes them to significant seasonal temperature fluctuations.
Similar species
Colombian Tetra
Hyphessobrycon columbianus
Bleeding Heart Tetra
Hyphessobrycon erythrostigma
Blind Cave Tetra
Astyanax mexicanus
Serpae Tetra
Hyphessobrycon eques
We’re adding more full species guides as the catalogue grows.
Compatible tank mates
Reviewed guidance based on this species' recorded traits.
- Great
Zebra Danio
Danio rerio
Both species are incredibly active, thrive in cooler water, and are fast enough to avoid any fin-nipping tendencies.
- Great
Peppered Corydoras
Corydoras paleatus
A robust, cool-water tolerant bottom dweller that stays well out of the mid-water tetra squabbles.
- Compatible with caution
Tiger Barb
Puntigrus tetrazona
Shares a similar boisterous, fin-nipping temperament; they can hold their own, but require a large tank to prevent constant clashes.
- Not recommended
Angelfish
Pterophyllum scalare
Slow-moving with trailing fins, making them a prime target for the persistent and nippy behaviour of these tetras.
- Not recommended
Guppy
Poecilia reticulata
Their long fins and relatively slow swimming speed mean they will be relentlessly harassed and shredded.
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