Clown Loach and Lionfish Compatibility Overview
Clown Loach and Lionfish are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Clown Loach wants 6.0โ7.5 and Lionfish wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Clown Loach | Lionfish | Verdict |
|---|---|---|---|
| Temperature | 77โ86ยฐF | 72โ82ยฐF | โ 77โ82ยฐF |
| pH Range | 6.0โ7.5 | 8.1โ8.4 | โ No overlap |
| Temperament | peaceful | aggressive | โ Risk |
| Adult Size | 12 in | 15.0 in | โ Similar |
| Min. Group | 5+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Clown Loach โ Chromobotia macracanthus
Striking striped loach that grows very large. Peaceful with fish but will eat shrimp, snails and tiny fish.
โ Full Clown Loach care guide
Lionfish โ Pterois volitans
Lionfish are popular saltwater aquarium fish known for their striking colors and intimidating spines. These fish require a large tank and careful attention to water parameters. Aggressive by nature, they can be harmful to smaller fish and invertebrates.
Frequently Asked Questions
Can Clown Loach live with Lionfish?
Generally not recommended. Clown Loach and Lionfish are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Clown Loach wants 6.0โ7.5 and Lionfish wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Clown Loach and Lionfish together?
A minimum of 100 gallons is recommended for keeping Clown Loach and Lionfish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Loach and Lionfish?
77โ82ยฐF โ inside Clown Loach's 77โ86ยฐF and Lionfish's 72โ82ยฐF.
Is a Clown Loach aggressive toward a Lionfish?
Clown Loach is peaceful and Lionfish is aggressive. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely.
Related Compatibility Guides
Tank Size for Clown Loach and Lionfish
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 120 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 180 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |