Fish comparison
Siamese Fighting Fish vs Ember Tetra
How the Siamese Fighting Fish and Ember Tetra compare on care, size, water and temperament, and which fish suits your tank.
By Mike ElmiraUpdated
TL;DR, Siamese Fighting Fish vs Ember Tetra
The Siamese Fighting Fish and the Ember Tetra come up together a lot when people are choosing a fish, and they are close enough to weigh side by side. Both are happy somewhere around 24 to 28 °C and pH 6 to 7, so a single tank can suit either one. Neither is harder than the other to keep, so the choice comes down to look and stocking rather than skill. If tank space is tight, the Siamese Fighting Fish needs less room to feel settled; give the Ember Tetra the nod when you have the litres to spare.
Group compatibility overview
Excellent fit
Every key parameter overlaps and no major conflicts surfaced.
1 note
Temperature
- Siamese Fighting Fish24–28 °C
- Ember Tetra23–29 °C
pH
- Siamese Fighting Fish6–7.5
- Ember Tetra5.5–7
Hardness
- Siamese Fighting Fish3–15 dGH
- Ember Tetra1–10 dGH
What to plan for
- 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.
Full attributes
Every parameter, side by side| Parameter |  FishSiamese Fighting FishBetta splendens |  FishEmber TetraHyphessobrycon amandae |
|---|---|---|
| Category | Fish | Fish |
| Origin | Mekong basin, Thailand and Cambodia | Rio das Mortes basin, Brazil |
| Family | Osphronemidae | Characidae |
| Temperature | 24–28 °C | 23–29 °C |
| pH | 6.0–7.5 | 5.5–7.0 |
| Hardness (dGH) | 3–15 | 1–10 |
| Flow rate | Very low | Low |
| Min tank | 20 L | 40 L |
| Adult size | 6–7 cm | 2 cm |
| Difficulty | 2 / 5 | 2 / 5 |
| Lifespan | 3–5 yrs | 2–4 yrs |
| Diet | Carnivore | Omnivore |
| Water column | All | Mid |
| Schooling | No | Yes |
| Plant safe | Yes | Yes |
| Shrimp safe | No (adult bettas pick off shrimp) | 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 Siamese Fighting Fish and Ember Tetra together?
Yes. Their temperature and pH ranges overlap around 24 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 Siamese Fighting Fish or the Ember Tetra?
They sit at the same care level, both beginner-friendly, so neither is the obvious beginner pick. The decision is really about the look you're after.
Do Siamese Fighting Fish and Ember Tetra need the same water?
Close to it. Aim for 24 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 Siamese Fighting Fish and the Ember Tetra?
Temperament is the big one. The Siamese Fighting Fish is territorial when breeding and the Ember Tetra is peaceful, which changes who you can house them with.