Guppy and Julii Cory Compatibility Overview
Guppy and Julii Cory 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 20-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Guppy | Julii Cory | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 68โ79ยฐF | โ 72โ79ยฐF |
| pH Range | 6.8โ8.5 | 5.5โ7.5 | โ ๏ธ 6.8โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.5 in | 2.2 in | โ Similar |
| Min. Group | 3+ | 6+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Guppy โ Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
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.
Frequently Asked Questions
Can Guppy live with Julii Cory?
Yes, in a well-planned setup. Guppy and Julii Cory 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 20-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Guppy and Julii Cory together?
A minimum of 20 gallons is recommended for keeping Guppy and Julii Cory together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Guppy and Julii Cory?
72โ79ยฐF โ inside Guppy's 72โ82ยฐF and Julii Cory's 68โ79ยฐF.
Is a Guppy aggressive toward a Julii Cory?
Guppy is peaceful and Julii Cory is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Guppy and Julii Cory
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 21 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |