Julii Cory and Silver Arowana Compatibility Overview
Julii Cory and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Julii Cory 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 | Julii Cory | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 68โ79ยฐF | 68โ86ยฐF | โ 68โ79ยฐF |
| 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
Julii Cory โ Corydoras julii
The Julii Cory is a popular, peaceful bottom-dweller that thrives in community tanks. With a lifespan of up to 5 years, they are suitable for beginners and experienced aquarists alike. These fish are known for their dark brown coloration with distinctive white spots and a slender, flat body shape.
โ Full Julii Cory 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 Julii Cory live with Silver Arowana?
Generally not recommended. Julii Cory and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Julii Cory 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 Julii Cory and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Julii Cory and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Julii Cory and Silver Arowana?
68โ79ยฐF โ inside Julii Cory's 68โ79ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Julii Cory aggressive toward a Silver Arowana?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Julii Cory 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. |