Julii Cory and Swordtail Compatibility Overview
Julii Cory 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 | Julii Cory | Swordtail | Verdict |
|---|---|---|---|
| Temperature | 68โ79ยฐF | 65โ80ยฐF | โ 68โ79ยฐF |
| 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
Julii Cory โ Corydoras julii
The Julii Cory is a popular, peaceful bottom-dweller that thrives in community tanks. With a lifespan of up to 5 years, they are suitable for beginners and experienced aquarists alike. These fish are known for their dark brown coloration with distinctive white spots and a slender, flat body shape.
โ Full Julii Cory 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 Julii Cory live with Swordtail?
Yes, in a well-planned setup. Julii Cory 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 Julii Cory and Swordtail together?
A minimum of 75 gallons is recommended for keeping Julii Cory and Swordtail together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Julii Cory and Swordtail?
68โ79ยฐF โ inside Julii Cory's 68โ79ยฐF and Swordtail's 65โ80ยฐF.
Is a Julii Cory aggressive toward a Swordtail?
Julii Cory is peaceful and Swordtail is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Julii Cory 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. |