Black Ruby Barb and Blue Tang Compatibility Overview
Black Ruby Barb and Blue Tang 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 Blue Tang wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Black Ruby Barb | Blue Tang | Verdict |
|---|---|---|---|
| Temperature | 68โ81ยฐF | 72โ82ยฐF | โ 72โ81ยฐF |
| pH Range | 5.5โ7.5 | 8.1โ8.4 | โ No overlap |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 2.2 in | 12.0 in | โ 5ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 100 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
Blue Tang โ Paracanthurus hepatus
The Blue Tang is a popular saltwater fish known for its vibrant blue color and yellow stripes. These fish are generally peaceful and can be kept in a community tank with other non-aggressive species. They require a well-maintained, spacious tank with plenty of swimming space and hiding spots.
Frequently Asked Questions
Can Black Ruby Barb live with Blue Tang?
Generally not recommended. Black Ruby Barb and Blue Tang 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 Blue Tang 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 Blue Tang together?
A minimum of 100 gallons is recommended for keeping Black Ruby Barb and Blue Tang together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Black Ruby Barb and Blue Tang?
72โ81ยฐF โ inside Black Ruby Barb's 68โ81ยฐF and Blue Tang's 72โ82ยฐF.
Is a Black Ruby Barb aggressive toward a Blue Tang?
Black Ruby Barb is peaceful and Blue Tang is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Black Ruby Barb and Blue Tang
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 180 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 300 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 350 gal | Best when keeping larger schools or reducing territorial pressure. |