Can oscars live with koi?
Verdict
No
No. Oscars and koi should not share a tank. Koi are coldwater animals (59–77°F); oscars need 74–81°F. They overlap only at 74–77°F, the edge of both ranges.
What to watch
- Deal breakerKoi are coldwater animals (59–77°F); oscars need 74–81°F. They overlap only at 74–77°F, the edge of both ranges.
What works
- pH 7–8 suits both.
Water side by side
Size to scale
Care at a glance
| Oscar | Koi | |
|---|---|---|
| Temperature | 74–81 °F | 59–77 °F |
| pH | 6–8 | 7–8.5 |
| Adult size | 12.0 in | 24.0 in |
| Minimum tank | 75 gal | Pond |
| Temperament | Semi-aggressive | Peaceful |
| Swims at | Middle | All levels |
| Group | Alone or in pairs | Groups of 3+ |
| Diet | Carnivore | Omnivore |
Better tank mates for oscars
Common plecoYes
Clown loachYes
Black ghost knifeYes
BichirYes
Elephant nose fishYes
Chinese algae eaterYes
Better tank mates for koi
Questions
Can oscars live with koi?
No. Oscars and koi should not share a tank. Koi are coldwater animals (59–77°F); oscars need 74–81°F. They overlap only at 74–77°F, the edge of both ranges.
What temperature suits both oscars and koi?
74–77 °F. Oscars need 74–81 °F, koi need 59–77 °F.
What size tank do oscars and koi need together?
A pond. Koi outgrow indoor tanks.