Red Eye Tetra and Swordtail Compatibility Overview
Red Eye Tetra and Swordtail can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Red Eye Tetra is semi and Swordtail is peaceful, so give them room and cover rather than assuming they will ignore each other. A minimum 75-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Red Eye Tetra | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 72โ79ยฐF | 65โ80ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ8.0 | 7.0โ8.3 | โ 7.0โ8.0 |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 2.8 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
Red Eye Tetra โ Moenkhausia sanctaefilomenae
The Red Eye Tetra is a popular freshwater fish known for its vibrant red eyes and sleek, silver body. They are generally peaceful and can be kept in a community tank with other non-aggressive species. Their moderate activity level makes them suitable for a variety of aquarium setups. With proper care, they can live up to 5 years.
โ Full Red Eye 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 Red Eye Tetra live with Swordtail?
Yes, in a well-planned setup. Red Eye Tetra and Swordtail can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Red Eye Tetra is semi and Swordtail is peaceful, so give them room and cover rather than assuming they will ignore each 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 Red Eye Tetra and Swordtail together?
A minimum of 75 gallons is recommended for keeping Red Eye Tetra and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Red Eye Tetra and Swordtail?
72โ79ยฐF โ inside Red Eye Tetra's 72โ79ยฐF and Swordtail's 65โ80ยฐF.
Is a Red Eye Tetra aggressive toward a Swordtail?
Red Eye Tetra is semi and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Red Eye 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. |