Black Ruby Barb and Swordtail Compatibility Overview
Black Ruby Barb and Swordtail can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 75-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Black Ruby Barb | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 68โ81ยฐF | 65โ80ยฐF | โ 68โ80ยฐF |
| pH Range | 5.5โ7.5 | 7.0โ8.3 | โ ๏ธ 7.0โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.2 in | 5 in | โ ๏ธ 2.3ร difference |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
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
Swordtail โ Xiphophorus hellerii
Hardy livebearer with a distinctive elongated lower tail fin in males. Peaceful community fish that tolerate a wide temperature range.
Frequently Asked Questions
Can Black Ruby Barb live with Swordtail?
Yes, in a well-planned setup. Black Ruby Barb and Swordtail can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 75-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Black Ruby Barb and Swordtail together?
A minimum of 75 gallons is recommended for keeping Black Ruby Barb and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Black Ruby Barb and Swordtail?
68โ80ยฐF โ inside Black Ruby Barb's 68โ81ยฐF and Swordtail's 65โ80ยฐF.
Is a Black Ruby Barb aggressive toward a Swordtail?
Black Ruby Barb is peaceful and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Black Ruby Barb and Swordtail
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. |