Fish comparison
Cardinal Tetra vs Kissing Gourami
How the Cardinal Tetra and Kissing Gourami compare on care, size, water and temperament, and which fish suits your tank.
By Mike ElmiraUpdated
TL;DR, Cardinal Tetra vs Kissing Gourami
The Cardinal Tetra and the Kissing Gourami 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 27 °C and pH 6 to 6.5, so a single tank can suit either one. The Kissing Gourami is the more forgiving of the two, which matters if this is an early tank, while the Cardinal Tetra rewards a bit more attention. If tank space is tight, the Cardinal Tetra needs less room to feel settled; give the Kissing Gourami 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
- Cardinal Tetra23–27 °C
- Kissing Gourami22–28 °C
pH
- Cardinal Tetra4.5–6.5
- Kissing Gourami6–8
Hardness
- Cardinal Tetra1–6 dGH
- Kissing Gourami5–20 dGH
What to plan for
- Cardinal Tetra schools, stock at least 8You've planned for 1 cardinal tetra. Cardinal 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 |  FishCardinal TetraParacheirodon axelrodi |  FishKissing GouramiHelostoma temminckii |
|---|---|---|
| Category | Fish | Fish |
| Origin | Upper Orinoco and Rio Negro basins | Southeast Asia |
| Family | Characidae | Helostomatidae |
| Temperature | 23–27 °C | 22–28 °C |
| pH | 4.5–6.5 | 6.0–8.0 |
| Hardness (dGH) | 1–6 | 5–20 |
| Flow rate | Low | Low to Medium |
| Min tank | 75 L | 300 L |
| Adult size | 4–5 cm | 20–30 cm |
| Difficulty | 3 / 5 | 2 / 5 |
| Lifespan | 4–6 yrs | 10–15 yrs |
| Diet | Omnivore | Omnivore (filter-feeder leaning) |
| Water column | Mid | All |
| Schooling | Yes | No |
| Plant safe | Yes | No (grazes algae and soft plants) |
| Shrimp safe | Mostly (may eat shrimplets) | No |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Cardinal Tetra and Kissing Gourami together?
Yes. Their temperature and pH ranges overlap around 23 to 27 °C and pH 6 to 6.5, 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 Cardinal Tetra or the Kissing Gourami?
The Kissing Gourami is the easier of the two, closer to beginner-friendly, while the Cardinal Tetra leans middle-of-the-road.
Do Cardinal Tetra and Kissing Gourami need the same water?
Close to it. Aim for 23 to 27 °C and pH 6 to 6.5 and you're in the shared sweet spot for both. Full ranges are in the table above.
What's the main difference between the Cardinal Tetra and the Kissing Gourami?
Temperament is the big one. The Cardinal Tetra is peaceful and the Kissing Gourami is semi-aggressive, which changes who you can house them with.