Clown Knifefish and Glowlight Tetra Compatibility Overview
Clown Knifefish and Glowlight Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Glowlight Tetra 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 | Glowlight Tetra | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 75โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 6.0โ8.0 | 5.5โ7.5 | โ 6.0โ7.5 |
| Temperament | aggressive | peaceful | โ Risk |
| Adult Size | 39.4 in | 1.6 in | โ 25ร 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
Glowlight Tetra โ Hemigrammus erythrozonus
The Glowlight Tetra is a vibrant, peaceful community fish known for its silver body and bright red-gold highlights. It thrives in a well-planted tank with plenty of swimming space and a gentle water flow. These tetras are easy to care for and are suitable for beginners.
Frequently Asked Questions
Can Clown Knifefish live with Glowlight Tetra?
Generally not recommended. Clown Knifefish and Glowlight Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Glowlight Tetra 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 Glowlight Tetra together?
A minimum of 100 gallons is recommended for keeping Clown Knifefish and Glowlight Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Knifefish and Glowlight Tetra?
75โ82ยฐF โ inside Clown Knifefish's 68โ82ยฐF and Glowlight Tetra's 75โ82ยฐF.
Is a Clown Knifefish aggressive toward a Glowlight Tetra?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Clown Knifefish and Glowlight 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. |