How Many Golden Wonder Killifish in a 20-Gallon Tank?
In a 20-gallon tank, plan on about 1–2 Golden Wonder Killifish, leaving room for tankmates and filtration headroom.
Why
Stocking is driven by adult size and waste output, not just fish count. Golden Wonder Killifish reaches about 4" with a moderate bioload, and needs 72–77°F water at pH 6–7.5. Always cycle the tank and test water before adding livestock.
| Adult size | 4" |
|---|---|
| Minimum tank | 20 gallons |
| Temperature | 72–77°F |
| pH | 6–7.5 |
| Temperament | Semi-aggressive |
| Schooling | No |
| Diet | Carnivore |
| Care level | Easy |
| Origin | India and Sri Lanka |
More fish for a 20-gallon tank → Golden Wonder Killifish tankmates →