Fish comparison
Buenos Aires Tetra vs Ember Tetra
How the Buenos Aires Tetra and Ember Tetra compare on care, size, water and temperament, and which fish suits your tank.
By Mike ElmiraUpdated
TL;DR, Buenos Aires Tetra vs Ember Tetra
The Buenos Aires Tetra and the Ember Tetra are close cousins, both in the Hyphessobrycon group, so at a glance they ask for a lot of the same things. Both are happy somewhere around 23 to 28 °C and pH 6 to 7, so a single tank can suit either one. The Buenos Aires Tetra is the more forgiving of the two, which matters if this is an early tank, while the Ember Tetra rewards a bit more attention. If tank space is tight, the Ember Tetra needs less room to feel settled; give the Buenos Aires Tetra the nod when you have the litres to spare.
Group compatibility overview
Excellent fit
Every key parameter overlaps and no major conflicts surfaced.
4 notes
Temperature
- Buenos Aires Tetra18–28 °C
- Ember Tetra23–29 °C
pH
- Buenos Aires Tetra6–8
- Ember Tetra5.5–7
Hardness
- Buenos Aires Tetra5–20 dGH
- Ember Tetra1–10 dGH
What to plan for
- Buenos Aires Tetra schools, stock at least 8You've planned for 1 buenos aires tetra. Buenos Aires Tetra need a group of at least 8 to feel safe and shoal naturally, below that they're stressed and lose colour. Dial up the count, or remove the species.
- Ember Tetra schools, stock at least 8You've planned for 1 ember tetra. Ember Tetra need a group of at least 8 to feel safe and shoal naturally, below that they're stressed and lose colour. Dial up the count, or remove the species.
- No bottom teamNo bottom-dwelling fish or shrimp. A small group of corydoras or a shrimp colony picks up leftover food and keeps detritus in check.
- 100% of your fish swim in the midHeavy concentration in a single zone. Spreading stocking across all three levels makes the tank read fuller for the same bioload.
Full attributes
Every parameter, side by side| Parameter |  FishBuenos Aires TetraHyphessobrycon anisitsi |  FishEmber TetraHyphessobrycon amandae |
|---|---|---|
| Category | Fish | Fish |
| Origin | Paraguay, Uruguay, southern Brazil | Rio das Mortes basin, Brazil |
| Family | Characidae | Characidae |
| Temperature | 18–28 °C | 23–29 °C |
| pH | 6.0–8.0 | 5.5–7.0 |
| Hardness (dGH) | 5–20 | 1–10 |
| Flow rate | Medium to high | Low |
| Min tank | 150 L | 40 L |
| Adult size | 7–10 cm | 2 cm |
| Difficulty | 1 / 5 | 2 / 5 |
| Lifespan | 5–7 yrs | 2–4 yrs |
| Diet | Omnivore (heavy plant-grazer) | Omnivore |
| Water column | Mid | Mid |
| Schooling | Yes | Yes |
| Plant safe | No (will defoliate soft plants) | Yes |
| Shrimp safe | No | Yes (adults safe with adult shrimp) |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Buenos Aires Tetra and Ember Tetra together?
Yes. Their temperature and pH ranges overlap around 23 to 28 °C and pH 6 to 7, so one set of water conditions keeps both comfortable. Match group sizes and cover the usual planted-tank basics and they share a tank fine.
Which is easier to keep, the Buenos Aires Tetra or the Ember Tetra?
The Buenos Aires Tetra is the easier of the two, closer to very easy, while the Ember Tetra leans beginner-friendly.
Do Buenos Aires Tetra and Ember Tetra need the same water?
Close to it. Aim for 23 to 28 °C and pH 6 to 7 and you're in the shared sweet spot for both. Full ranges are in the table above.
What's the main difference between the Buenos Aires Tetra and the Ember Tetra?
Temperament is the big one. The Buenos Aires Tetra is semi-aggressive and the Ember Tetra is peaceful, which changes who you can house them with.