Clown Knifefish and Rosy Barb Compatibility Overview
Clown Knifefish and Rosy Barb are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Rosy Barb is peaceful. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Clown Knifefish | Rosy Barb | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 61โ75ยฐF | โ 68โ75ยฐF |
| pH Range | 6.0โ8.0 | 6.0โ8.0 | โ 6.0โ8.0 |
| Temperament | aggressive | peaceful | โ Risk |
| Adult Size | 39.4 in | 3.9 in | โ 10ร difference |
| Min. Group | 1+ | 8+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Clown Knifefish โ Chitala ornata
The Clown Knifefish is a unique and visually striking species known for its slender body and distinctive coloration. It is a solitary fish that requires a spacious tank to thrive. With a moderate activity level and low aggression, it can be a suitable addition to a community tank with similarly peaceful species.
โ Full Clown Knifefish care guide
Rosy Barb โ Pethia conchonius
The Rosy Barb is a popular freshwater fish known for its vibrant coloration and peaceful nature. It is well-suited for community tanks with other non-aggressive species. They require a well-maintained environment and can be sensitive to water quality fluctuations. With proper care, they can thrive and add a splash of color to your aquarium.
Frequently Asked Questions
Can Clown Knifefish live with Rosy Barb?
Generally not recommended. Clown Knifefish and Rosy Barb are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Rosy Barb is peaceful. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Clown Knifefish and Rosy Barb together?
A minimum of 100 gallons is recommended for keeping Clown Knifefish and Rosy Barb together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Knifefish and Rosy Barb?
68โ75ยฐF โ inside Clown Knifefish's 68โ82ยฐF and Rosy Barb's 61โ75ยฐF.
Is a Clown Knifefish aggressive toward a Rosy Barb?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Clown Knifefish and Rosy Barb
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 300 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 450 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 550 gal | Best when keeping larger schools or reducing territorial pressure. |