Clown Knifefish and Silver Arowana Compatibility Overview
Clown Knifefish and Silver Arowana are generally not recommended to be housed together. Clown Knifefish and Silver Arowana are both aggressive; housing them together invites sustained fighting rather than an occasional squabble. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Clown Knifefish | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 68โ86ยฐF | โ 68โ82ยฐF |
| pH Range | 6.0โ8.0 | 5.0โ7.5 | โ 6.0โ7.5 |
| Temperament | aggressive | aggressive | โ Risk |
| Adult Size | 39.4 in | 31.5 in | โ Similar |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Clown Knifefish โ Chitala ornata
The Clown Knifefish is a unique and visually striking species known for its slender body and distinctive coloration. It is a solitary fish that requires a spacious tank to thrive. With a moderate activity level and low aggression, it can be a suitable addition to a community tank with similarly peaceful species.
โ Full Clown Knifefish care guide
Silver Arowana โ Osteoglossum bicirrhosum
The Silver Arowana is a majestic and unique fish known for its striking appearance and size. It is a large, predatory fish that requires a spacious tank and specific water conditions. While not a community fish, it can be kept with compatible, larger species. They are sensitive to stress and require careful water quality management.
Frequently Asked Questions
Can Clown Knifefish live with Silver Arowana?
Generally not recommended. Clown Knifefish and Silver Arowana are generally not recommended to be housed together. Clown Knifefish and Silver Arowana are both aggressive; housing them together invites sustained fighting rather than an occasional squabble. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Clown Knifefish and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Clown Knifefish and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Knifefish and Silver Arowana?
68โ82ยฐF โ inside Clown Knifefish's 68โ82ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Clown Knifefish aggressive toward a Silver Arowana?
Clown Knifefish and Silver Arowana are both aggressive; housing them together invites sustained fighting rather than an occasional squabble.
Related Compatibility Guides
Tank Size for Clown Knifefish and Silver Arowana
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 300 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 450 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 550 gal | Best when keeping larger schools or reducing territorial pressure. |