Species profile
Silver Arowana
Osteoglossum bicirrhosumSilver Arowana (Osteoglossum bicirrhosum) is a solo centerpiece fish for a cycled 250+ gallon freshwater aquarium. Plan for about 36 inches as an adult, 75-82°F water, pH 6-7.5, and advanced care. Keep only one per tank, and choose tankmates with matching water needs and low aggression.
TerritorialHigh energyFlashyAdvanced care
250 galMinimum tank
36 inAdult size
1Schooling minimum
75-82°FTemperature
Water Range
- pH
- 6-7.5
- GH
- 2-12 dGH
- KH
- 1-8 dKH
Behavior
- Temperament
- Assertive
- Fin nipping
- 0/5
- Territory
- 4/5
Diet and Care
- Diet
- carnivore
- Diet difficulty
- 4/5
- Care difficulty
- 4/5
Planning Notes
Predatory or specialist fish; plan for adult size, secure lids, and meaty feeding needs. Large-growing species; needs long-term tank planning beyond the usual community aquarium.
This species may need live, frozen, fresh, or otherwise specialized foods.
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These matches are starting points with overlapping water ranges and lower behavior risk. Always check the full stocking plan, tank size, and group counts before buying.
Run Silver Arowana through the checker with your tank size, cycle status, water, group count, and tankmates before buying.
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