Silver Arowana and Silver Dollar Compatibility Overview
Silver Arowana and Silver Dollar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Silver Arowana is aggressive and Silver Dollar is peaceful. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Silver Arowana | Silver Dollar | Verdict |
|---|---|---|---|
| Temperature | 68โ86ยฐF | 75โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 5.0โ7.5 | 6.0โ7.0 | โ 6.0โ7.0 |
| Temperament | aggressive | peaceful | โ Risk |
| Adult Size | 31.5 in | 5.9 in | โ 5ร difference |
| Min. Group | 1+ | 5+ | 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
Silver Dollar โ Metynnis argenteus
The Metynnis argenteus, known as the Silver Dollar fish, is a popular freshwater species with a distinctive silver color and disc-shaped body. They require a spacious tank and are best kept in groups to prevent bullying. Their peaceful nature makes them suitable for community tanks, but they are not known to school.
Frequently Asked Questions
Can Silver Arowana live with Silver Dollar?
Generally not recommended. Silver Arowana and Silver Dollar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Silver Arowana is aggressive and Silver Dollar is peaceful. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Silver Arowana and Silver Dollar together?
A minimum of 100 gallons is recommended for keeping Silver Arowana and Silver Dollar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Silver Arowana and Silver Dollar?
75โ82ยฐF โ inside Silver Arowana's 68โ86ยฐF and Silver Dollar's 75โ82ยฐF.
Is a Silver Arowana aggressive toward a Silver Dollar?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Silver Arowana and Silver Dollar
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. |