Fish comparison
Chili Rasbora vs Golden Wonder Killifish
How the Chili Rasbora and Golden Wonder Killifish compare on care, size, water and temperament, and which fish suits your tank.
By Mike ElmiraUpdated
TL;DR, Chili Rasbora vs Golden Wonder Killifish
The Chili Rasbora and the Golden Wonder Killifish 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 6.5, so a single tank can suit either one. The Golden Wonder Killifish is the more forgiving of the two, which matters if this is an early tank, while the Chili Rasbora rewards a bit more attention. If tank space is tight, the Chili Rasbora needs less room to feel settled; give the Golden Wonder Killifish the nod when you have the litres to spare.
Group compatibility overview
Workable with care
A few warnings, pick equipment and stocking carefully.
1 conflict · 3 notes
Temperature
- Chili Rasbora24–28 °C
- Golden Wonder Killifish22–28 °C
pH
- Chili Rasbora4–6.5
- Golden Wonder Killifish6–7.5
Hardness
- Chili Rasbora1–4 dGH
- Golden Wonder Killifish5–20 dGH
What to plan for
- Hardness mismatchThe selected species can't share a hardness window. Soft-water species (CRS, cardinals) and hard-water species (livebearers, vals) need different tanks.
- Chili Rasbora schools, stock at least 10You've planned for 1 chili rasbora. Chili Rasbora 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 topHeavy 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 |  FishChili RasboraBoraras brigittae |  FishGolden Wonder KillifishAplocheilus lineatus |
|---|---|---|
| Category | Fish | Fish |
| Origin | Southwestern Borneo blackwater swamps | Southern India and Sri Lanka |
| Family | Cyprinidae | Aplocheilidae |
| Temperature | 24–28 °C | 22–28 °C |
| pH | 4.0–6.5 | 6.0–7.5 |
| Hardness (dGH) | 1–4 | 5–20 |
| Flow rate | Still to Low | Low |
| Min tank | 30 L | 75 L |
| Adult size | 1.7–2 cm | 8–10 cm |
| Difficulty | 3 / 5 | 2 / 5 |
| Lifespan | 3–4 yrs | 3–5 yrs |
| Diet | Micropredator | Carnivore |
| Water column | Mid to Top | Top |
| Schooling | Yes | No (loose group) |
| Plant safe | Yes | Yes |
| Shrimp safe | Yes (adults and adult shrimp) | No (eats shrimp) |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Chili Rasbora and Golden Wonder Killifish together?
Yes. Their temperature and pH ranges overlap around 24 to 28 °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 Chili Rasbora or the Golden Wonder Killifish?
The Golden Wonder Killifish is the easier of the two, closer to beginner-friendly, while the Chili Rasbora leans middle-of-the-road.
Do Chili Rasbora and Golden Wonder Killifish need the same water?
Close to it. Aim for 24 to 28 °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 Chili Rasbora and the Golden Wonder Killifish?
Temperament is the big one. The Chili Rasbora is peaceful and the Golden Wonder Killifish is semi-aggressive, which changes who you can house them with.