Black Ruby Barb and Silver Arowana Compatibility Overview
Black Ruby Barb and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Black Ruby Barb is peaceful and Silver Arowana is aggressive. 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 | Black Ruby Barb | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 68โ81ยฐF | 68โ86ยฐF | โ 68โ81ยฐF |
| pH Range | 5.5โ7.5 | 5.0โ7.5 | โ 5.5โ7.5 |
| Temperament | peaceful | aggressive | โ Risk |
| Adult Size | 2.2 in | 31.5 in | โ 14ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Black Ruby Barb โ Pethia nigrofasciata
The Black Ruby Barb is a vibrant, active species suitable for beginners. It requires a spacious tank and a school of its own kind to thrive. Its striking colors and lively nature make it a popular choice.
โ Full Black Ruby Barb 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 Black Ruby Barb live with Silver Arowana?
Generally not recommended. Black Ruby Barb and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Black Ruby Barb is peaceful and Silver Arowana is aggressive. 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 Black Ruby Barb and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Black Ruby Barb and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Black Ruby Barb and Silver Arowana?
68โ81ยฐF โ inside Black Ruby Barb's 68โ81ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Black Ruby Barb aggressive toward a Silver Arowana?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Black Ruby Barb 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 | 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. |