Silver Arowana and Swordtail Compatibility Overview
Silver Arowana and Swordtail are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Silver Arowana | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 68โ86ยฐF | 65โ80ยฐF | โ 68โ80ยฐF |
| pH Range | 5.0โ7.5 | 7.0โ8.3 | โ ๏ธ 7.0โ7.5 (narrow) |
| Temperament | aggressive | peaceful | โ Risk |
| Adult Size | 31.5 in | 5 in | โ 6ร difference |
| Min. Group | 1+ | 3+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
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.
โ Full Silver Arowana care guide
Swordtail โ Xiphophorus hellerii
Hardy livebearer with a distinctive elongated lower tail fin in males. Peaceful community fish that tolerate a wide temperature range.
Frequently Asked Questions
Can Silver Arowana live with Swordtail?
Generally not recommended. Silver Arowana and Swordtail are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Silver Arowana and Swordtail together?
A minimum of 100 gallons is recommended for keeping Silver Arowana and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Silver Arowana and Swordtail?
68โ80ยฐF โ inside Silver Arowana's 68โ86ยฐF and Swordtail's 65โ80ยฐF.
Is a Silver Arowana aggressive toward a Swordtail?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Silver Arowana and Swordtail
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 250 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 350 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 450 gal | Best when keeping larger schools or reducing territorial pressure. |