Fish comparison
Florida Flagfish vs Neon Tetra
How the Florida Flagfish and Neon Tetra compare on care, size, water and temperament, and which fish suits your tank.
By Mike ElmiraUpdated
TL;DR, Florida Flagfish vs Neon Tetra
The Florida Flagfish 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 20 to 26 °C and pH 6.5 to 7, so a single tank can suit either one. The Florida Flagfish is the more forgiving of the two, which matters if this is an early tank, while the Neon Tetra rewards a bit more attention. If tank space is tight, the Neon Tetra needs less room to feel settled; give the Florida Flagfish 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
- Florida Flagfish18–26 °C
- Neon Tetra20–26 °C
pH
- Florida Flagfish6.5–8
- Neon Tetra5.5–7
Hardness
- Florida Flagfish5–20 dGH
- Neon Tetra1–8 dGH
What to plan for
- 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.
Full attributes
Every parameter, side by side| Parameter |  FishFlorida FlagfishJordanella floridae |  FishNeon TetraParacheirodon innesi |
|---|---|---|
| Category | Fish | Fish |
| Origin | Florida and the southeastern United States | Upper Amazon basin, South America |
| Family | Cyprinodontidae | Characidae |
| Temperature | 18–26 °C | 20–26 °C |
| pH | 6.5–8.0 | 5.5–7.0 |
| Hardness (dGH) | 5–20 | 1–8 |
| Flow rate | Low to Medium | Low to Medium |
| Min tank | 75 L | 60 L |
| Adult size | 5–6 cm | 3.5–4 cm |
| Difficulty | 1 / 5 | 2 / 5 |
| Lifespan | 3–5 yrs | 5–8 yrs |
| Diet | Omnivore (heavy algae grazer) | Omnivore |
| Water column | All | Mid |
| Schooling | Loose group | Yes |
| Plant safe | Yes | Yes |
| Shrimp safe | Adults only | 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 Florida Flagfish and Neon Tetra together?
Yes. Their temperature and pH ranges overlap around 20 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 Florida Flagfish or the Neon Tetra?
The Florida Flagfish is the easier of the two, closer to very easy, while the Neon Tetra leans beginner-friendly.
Do Florida Flagfish and Neon Tetra need the same water?
Close to it. Aim for 20 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 Florida Flagfish and the Neon Tetra?
Temperament is the big one. The Florida Flagfish is semi-aggressive and the Neon Tetra is peaceful, which changes who you can house them with.