Pygmy Corydoras and Silver Arowana Compatibility Overview
Pygmy Corydoras and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Pygmy Corydoras 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 | Pygmy Corydoras | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 72โ79ยฐF | 68โ86ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ7.5 | 5.0โ7.5 | โ 6.0โ7.5 |
| Temperament | peaceful | aggressive | โ Risk |
| Adult Size | 1 in | 31.5 in | โ 32ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Pygmy Corydoras โ Corydoras pygmaeus
Tiny armoured catfish that school in open water as well as on the substrate. Peaceful with all non-aggressive species.
โ Full Pygmy Corydoras 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 Pygmy Corydoras live with Silver Arowana?
Generally not recommended. Pygmy Corydoras and Silver Arowana are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Pygmy Corydoras 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 Pygmy Corydoras and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Pygmy Corydoras and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Pygmy Corydoras and Silver Arowana?
72โ79ยฐF โ inside Pygmy Corydoras's 72โ79ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Pygmy Corydoras aggressive toward a Silver Arowana?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Pygmy Corydoras 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. |