Congo Tetra and Swordtail Compatibility Overview
Congo Tetra 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 | Congo Tetra | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 65โ80ยฐF | โ 73โ80ยฐF |
| pH Range | 6.0โ7.5 | 7.0โ8.3 | โ ๏ธ 7.0โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 3.1 in | 5 in | โ Similar |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Congo Tetra โ Phenacogrammus interruptus
The Congo Tetra is a vibrant and active fish that thrives in a well-maintained freshwater aquarium. With its striking coloration and peaceful nature, it's a great addition to any community tank. This species is best kept in groups and requires a spacious tank with plenty of swimming space.
โ Full Congo Tetra 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 Congo Tetra live with Swordtail?
Yes, in a well-planned setup. Congo Tetra 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 Congo Tetra and Swordtail together?
A minimum of 75 gallons is recommended for keeping Congo Tetra and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Congo Tetra and Swordtail?
73โ80ยฐF โ inside Congo Tetra's 73โ82ยฐF and Swordtail's 65โ80ยฐF.
Is a Congo Tetra aggressive toward a Swordtail?
Congo Tetra is peaceful and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Congo Tetra 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. |