Clown Knifefish and Red Eye Tetra Compatibility Overview
Clown Knifefish and Red Eye Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Red Eye Tetra is semi. 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 | Red Eye Tetra | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 72โ79ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ8.0 | 6.0โ8.0 | โ 6.0โ8.0 |
| Temperament | aggressive | semi | โ Risk |
| Adult Size | 39.4 in | 2.8 in | โ 14ร difference |
| Min. Group | 1+ | 6+ | 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
Red Eye Tetra โ Moenkhausia sanctaefilomenae
The Red Eye Tetra is a popular freshwater fish known for its vibrant red eyes and sleek, silver body. They are generally peaceful and can be kept in a community tank with other non-aggressive species. Their moderate activity level makes them suitable for a variety of aquarium setups. With proper care, they can live up to 5 years.
Frequently Asked Questions
Can Clown Knifefish live with Red Eye Tetra?
Generally not recommended. Clown Knifefish and Red Eye Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Red Eye Tetra is semi. 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 Red Eye Tetra together?
A minimum of 100 gallons is recommended for keeping Clown Knifefish and Red Eye Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Knifefish and Red Eye Tetra?
72โ79ยฐF โ inside Clown Knifefish's 68โ82ยฐF and Red Eye Tetra's 72โ79ยฐF.
Is a Clown Knifefish aggressive toward a Red Eye Tetra?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Clown Knifefish and Red Eye Tetra
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. |