Compatibility Overview
Koi and Panda Cory are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Koi | Panda Cory | Verdict |
|---|---|---|---|
| Temperature | 50–75°F | 72–79°F | ⚠️ 72–75°F (narrow) |
| pH Range | 7.0–8.5 | 6.5–7.5 | ⚠️ 7.0–7.5 (narrow) |
| Temperament | peaceful | semi | ⚠️ Monitor |
| Adult Size | 24 in | 2.0 in | ❌ 12× difference |
| Min. Group | 2+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Koi — Cyprinus rubrofuscus
Large pond fish that require hundreds of gallons and cool water. Will eat any fish small enough to fit in their mouth.
Panda Cory — Aquarium species
The Corydoras panda, known for its distinctive white face and black body, is a popular freshwater fish. They are peaceful and make excellent additions to community tanks. They are moderately active and can thrive in a well-maintained environment. As bottom-dwellers, they require a tank with plenty of hiding spots. Their diet should be balanced with a variety
Frequently Asked Questions
Can Koi live with Panda Cory?
Generally not recommended. Koi and Panda Cory are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Koi and Panda Cory together?
A minimum of 100 gallons is recommended for keeping Koi and Panda Cory together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Koi and Panda Cory?
72–75°F (narrow)
Is a Koi aggressive toward a Panda Cory?
Koi is peaceful and Panda Cory is semi. These animals require different water types and cannot share one aquarium.
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 | 43/100 |
| Ph | 50/100 |
| Temperament | 75/100 |
| Adult Size | 8/100 |
| 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 | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 180 gal | Best when keeping larger schools or reducing territorial pressure. |