Corydoras and Pajama Cardinalfish Compatibility Overview
Corydoras Catfish and Pajama Cardinalfish are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Corydoras Catfish wants 6.0โ8.0 and Pajama Cardinalfish wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Corydoras Catfish | Pajama Cardinalfish | Verdict |
|---|---|---|---|
| Temperature | 70โ79ยฐF | 72โ82ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ8.0 | 8.1โ8.4 | โ No overlap |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.5 in | 3.5 in | โ Similar |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Corydoras Catfish โ Corydoras spp.
Armoured bottom-dwelling catfish that are peaceful with all non-aggressive species. Need fine sand substrate to protect delicate barbels.
โ Full Corydoras Catfish care guide
Pajama Cardinalfish โ Sphaeramia nematoptera
The Pajama Cardinalfish is a popular, beginner-friendly fish that can add a splash of color to your aquarium. They are generally peaceful and can be kept in a community tank. With moderate activity levels and a preference for undisturbed swimming spaces, they require a well-maintained water quality and a spacious tank.
Frequently Asked Questions
Can Corydoras Catfish live with Pajama Cardinalfish?
Generally not recommended. Corydoras Catfish and Pajama Cardinalfish are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Corydoras Catfish wants 6.0โ8.0 and Pajama Cardinalfish wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Corydoras Catfish and Pajama Cardinalfish together?
A minimum of 55 gallons is recommended for keeping Corydoras Catfish and Pajama Cardinalfish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Corydoras Catfish and Pajama Cardinalfish?
72โ79ยฐF โ inside Corydoras Catfish's 70โ79ยฐF and Pajama Cardinalfish's 72โ82ยฐF.
Is a Corydoras Catfish aggressive toward a Pajama Cardinalfish?
Corydoras Catfish is peaceful and Pajama Cardinalfish is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Corydoras and Pajama Cardinalfish
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |