Fish comparison
Forktail Blue-Eye vs Neon Tetra
How the Forktail Blue-Eye and Neon Tetra compare on care, size, water and temperament, and which fish suits your tank.
By Mike ElmiraUpdated
TL;DR, Forktail Blue-Eye vs Neon Tetra
The Forktail Blue-Eye 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 6.5 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. Read the full care notes on each below and pick the one whose look and pace fit the tank you're building.
Group compatibility overview
Excellent fit
Every key parameter overlaps and no major conflicts surfaced.
4 notes
Temperature
- Forktail Blue-Eye23–27 °C
- Neon Tetra20–26 °C
pH
- Forktail Blue-Eye6.5–7.5
- Neon Tetra5.5–7
Hardness
- Forktail Blue-Eye5–15 dGH
- Neon Tetra1–8 dGH
What to plan for
- Forktail Blue-Eye schools, stock at least 6You've planned for 1 forktail blue-eye. Forktail Blue-Eye 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.
- 67% 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 |  FishForktail Blue-EyePseudomugil furcatus |  FishNeon TetraParacheirodon innesi |
|---|---|---|
| Category | Fish | Fish |
| Origin | Papua New Guinea | Upper Amazon basin, South America |
| Family | Pseudomugilidae | Characidae |
| Temperature | 23–27 °C | 20–26 °C |
| pH | 6.5–7.5 | 5.5–7.0 |
| Hardness (dGH) | 5–15 | 1–8 |
| Flow rate | Low to Medium | Low to Medium |
| Min tank | 60 L | 60 L |
| Adult size | 4–5 cm | 3.5–4 cm |
| Difficulty | 2 / 5 | 2 / 5 |
| Lifespan | 2–3 yrs | 5–8 yrs |
| Diet | Micropredator | Omnivore |
| Water column | Mid to Top | Mid |
| Schooling | Yes | Yes |
| Plant safe | Yes | Yes |
| Shrimp safe | Yes (adult shrimp) | 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 Forktail Blue-Eye and Neon Tetra together?
Yes. Their temperature and pH ranges overlap around 23 to 26 °C and pH 6.5 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 Forktail Blue-Eye 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 Forktail Blue-Eye and Neon Tetra need the same water?
Close to it. Aim for 23 to 26 °C and pH 6.5 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 Forktail Blue-Eye and the Neon Tetra?
It comes down to look, size and pace rather than one being flatly better. The table above lays the numbers out row by row.