Compatibility Overview
Julii Cory and Pea Puffer can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 10 gallons), dense planting, and close monitoring are essential.
| Factor | Julii Cory | Pea Puffer | Verdict |
|---|---|---|---|
| Temperature | 72–79°F | 74–82°F | ✅ 74–79°F |
| pH Range | 6.0–7.0 | 7.0–8.0 | ⚠️ 7.0–7.0 (narrow) |
| Temperament | semi | semi | ⚠️ Monitor |
| Adult Size | 1.2 in | 1 in | ✅ Similar |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 10 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Julii Cory — Aquarium species
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. They are moderately active and prefer a well-planted tank wit
Pea Puffer — Carinotetraodon travancoricus
World's smallest pufferfish — intensely territorial and nippy despite tiny size. Will attack fins and eat shrimp and snails.
Frequently Asked Questions
Can Julii Cory live with Pea Puffer?
With significant caution and a larger tank. Julii Cory and Pea Puffer can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 10 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Julii Cory and Pea Puffer together?
A minimum of 10 gallons is recommended for keeping Julii Cory and Pea Puffer together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Julii Cory and Pea Puffer?
74–79°F
Is a Julii Cory aggressive toward a Pea Puffer?
Julii Cory is semi and Pea Puffer is semi. Their preferred pH ranges are difficult to reconcile.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 71/100 |
| Ph | 0/100 |
| Temperament | 62/100 |
| Adult Size | 100/100 |
| Swim Zone | 92/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 10 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 15 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 20 gal | Best when keeping larger schools or reducing territorial pressure. |