Moonlight Gourami and Pajama Cardinalfish Compatibility Overview
Moonlight Gourami 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: Moonlight Gourami wants 6.0โ7.5 and Pajama Cardinalfish wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Moonlight Gourami | Pajama Cardinalfish | Verdict |
|---|---|---|---|
| Temperature | 77โ86ยฐF | 72โ82ยฐF | โ 77โ82ยฐF |
| pH Range | 6.0โ7.5 | 8.1โ8.4 | โ No overlap |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 5.9 in | 3.5 in | โ Similar |
| Min. Group | 1+ | 3+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Moonlight Gourami โ Trichopodus microlepis
The Moonlight Gourami is a beautiful freshwater fish known for its silvery blue color and red eyes. It is a peaceful community fish suitable for beginners and can thrive in a well-maintained aquarium. These fish are sensitive to water quality and require a spacious tank with plenty of swimming space.
โ Full Moonlight Gourami 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 Moonlight Gourami live with Pajama Cardinalfish?
Generally not recommended. Moonlight Gourami 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: Moonlight Gourami wants 6.0โ7.5 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 Moonlight Gourami and Pajama Cardinalfish together?
A minimum of 75 gallons is recommended for keeping Moonlight Gourami and Pajama Cardinalfish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Moonlight Gourami and Pajama Cardinalfish?
77โ82ยฐF โ inside Moonlight Gourami's 77โ86ยฐF and Pajama Cardinalfish's 72โ82ยฐF.
Is a Moonlight Gourami aggressive toward a Pajama Cardinalfish?
Moonlight Gourami is peaceful and Pajama Cardinalfish is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Moonlight Gourami 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 | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |