Congo Tetra and Silver Arowana Compatibility Overview
Congo Tetra and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Congo Tetra 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 | Congo Tetra | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 68โ86ยฐF | โ 73โ82ยฐF |
| pH Range | 6.0โ7.5 | 5.0โ7.5 | โ 6.0โ7.5 |
| Temperament | peaceful | aggressive | โ Risk |
| Adult Size | 3.1 in | 31.5 in | โ 10ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Congo Tetra โ Phenacogrammus interruptus
The Congo Tetra is a vibrant and active fish that thrives in a well-maintained freshwater aquarium. With its striking coloration and peaceful nature, it's a great addition to any community tank. This species is best kept in groups and requires a spacious tank with plenty of swimming space.
โ Full Congo Tetra 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 Congo Tetra live with Silver Arowana?
Generally not recommended. Congo Tetra and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Congo Tetra 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 Congo Tetra and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Congo Tetra and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Congo Tetra and Silver Arowana?
73โ82ยฐF โ inside Congo Tetra's 73โ82ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Congo Tetra aggressive toward a Silver Arowana?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Congo Tetra 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. |