Black Ruby Barb and Firefish Goby Compatibility Overview
Black Ruby Barb and Firefish Goby 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: Black Ruby Barb wants 5.5โ7.5 and Firefish Goby wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Black Ruby Barb | Firefish Goby | Verdict |
|---|---|---|---|
| Temperature | 68โ81ยฐF | 72โ82ยฐF | โ 72โ81ยฐF |
| pH Range | 5.5โ7.5 | 8.1โ8.4 | โ No overlap |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.2 in | 3.0 in | โ Similar |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Black Ruby Barb โ Pethia nigrofasciata
The Black Ruby Barb is a vibrant, active species suitable for beginners. It requires a spacious tank and a school of its own kind to thrive. Its striking colors and lively nature make it a popular choice.
โ Full Black Ruby Barb care guide
Firefish Goby โ Nemateleotris magnifica
The Firefish Goby is a popular choice for saltwater aquariums due to its vibrant colors and peaceful nature. These goby fish thrive in well-maintained tanks with plenty of live rock for them to explore. They are best kept in pairs or small groups and can be a great addition to a community tank with compatible species.
Frequently Asked Questions
Can Black Ruby Barb live with Firefish Goby?
Generally not recommended. Black Ruby Barb and Firefish Goby 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: Black Ruby Barb wants 5.5โ7.5 and Firefish Goby wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Black Ruby Barb and Firefish Goby together?
A minimum of 20 gallons is recommended for keeping Black Ruby Barb and Firefish Goby together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Black Ruby Barb and Firefish Goby?
72โ81ยฐF โ inside Black Ruby Barb's 68โ81ยฐF and Firefish Goby's 72โ82ยฐF.
Is a Black Ruby Barb aggressive toward a Firefish Goby?
Black Ruby Barb is peaceful and Firefish Goby is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Black Ruby Barb and Firefish Goby
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 20 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |