Fish comparison
Congo Tetra vs Neon Tetra
How the Congo Tetra and Neon Tetra compare on care, size, water and temperament, and which fish suits your tank.
By Mike ElmiraUpdated
TL;DR, Congo Tetra vs Neon Tetra
The Congo Tetra and the Neon 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 23 to 26 °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 Neon Tetra needs less room to feel settled; give the Congo 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
- Congo Tetra23–28 °C
- Neon Tetra20–26 °C
pH
- Congo Tetra6–7.5
- Neon Tetra5.5–7
Hardness
- Congo Tetra3–15 dGH
- Neon Tetra1–8 dGH
What to plan for
- Congo Tetra schools, stock at least 6You've planned for 1 congo tetra. Congo Tetra need a group of at least 6 to feel safe and shoal naturally, below that they're stressed and lose colour. Dial up the count, or remove the species.
- Neon Tetra schools, stock at least 10You've planned for 1 neon tetra. Neon Tetra need a group of at least 10 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 |  FishCongo TetraPhenacogrammus interruptus |  FishNeon TetraParacheirodon innesi |
|---|---|---|
| Category | Fish | Fish |
| Origin | Congo River basin, Democratic Republic of Congo | Upper Amazon basin, South America |
| Family | Alestidae | Characidae |
| Temperature | 23–28 °C | 20–26 °C |
| pH | 6.0–7.5 | 5.5–7.0 |
| Hardness (dGH) | 3–15 | 1–8 |
| Flow rate | Low to Medium | Low to Medium |
| Min tank | 150 L | 60 L |
| Adult size | 7–9 cm | 3.5–4 cm |
| Difficulty | 2 / 5 | 2 / 5 |
| Lifespan | 3–5 yrs | 5–8 yrs |
| Diet | Omnivore | Omnivore |
| Water column | Mid | Mid |
| Schooling | Yes | Yes |
| Plant safe | Mostly (may nibble very soft new growth) | Yes |
| Shrimp safe | No | Yes (with adults; may eat shrimplets) |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Congo Tetra and Neon Tetra together?
Yes. Their temperature and pH ranges overlap around 23 to 26 °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 Congo Tetra or the Neon 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 Congo Tetra and Neon Tetra need the same water?
Close to it. Aim for 23 to 26 °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 Congo Tetra and the Neon Tetra?
Space. The Congo Tetra wants about 150 litres minimum and the Neon Tetra around 60, so tank size can settle it.