Neon Rainbowfish and Silver Arowana Compatibility Overview
Neon Rainbowfish and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Neon Rainbowfish 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 | Neon Rainbowfish | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 68โ86ยฐF | โ 73โ82ยฐF |
| pH Range | 6.8โ7.5 | 5.0โ7.5 | โ ๏ธ 6.8โ7.5 (narrow) |
| 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
Neon Rainbowfish โ Melanotaenia praecox
The Neon Rainbowfish, known for its vibrant colors, is a popular addition to freshwater aquariums. These fish are generally peaceful and can be kept in community tanks with other peaceful species. They require a well-maintained tank with a good water flow and plenty of swimming space. Regular water changes and a balanced diet are essential for their health.
โ Full Neon Rainbowfish 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 Neon Rainbowfish live with Silver Arowana?
Generally not recommended. Neon Rainbowfish and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Neon Rainbowfish 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 Neon Rainbowfish and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Neon Rainbowfish and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Neon Rainbowfish and Silver Arowana?
73โ82ยฐF โ inside Neon Rainbowfish's 73โ82ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Neon Rainbowfish aggressive toward a Silver Arowana?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Neon Rainbowfish 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. |