Blue Tang and Hillstream Loach Compatibility Overview
Blue Tang and Hillstream Loach 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: Blue Tang wants 8.1โ8.4 and Hillstream Loach wants 6.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Blue Tang | Hillstream Loach | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 68โ75ยฐF | โ ๏ธ 72โ75ยฐF (narrow) |
| pH Range | 8.1โ8.4 | 6.0โ7.5 | โ No overlap |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 12.0 in | 2.6 in | โ 5ร difference |
| Min. Group | 1+ | 4+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Blue Tang โ Paracanthurus hepatus
The Blue Tang is a popular saltwater fish known for its vibrant blue color and yellow stripes. These fish are generally peaceful and can be kept in a community tank with other non-aggressive species. They require a well-maintained, spacious tank with plenty of swimming space and hiding spots.
Hillstream Loach โ Sewellia lineolata
Sewellia lineolata, known as the Hillstream Loach, is a fascinating species for aquarists. These fish require a well-oxygenated, clear water environment with plenty of hiding spots. With a lifespan of 7 years, they are a long-term commitment. Their olive green color and slender body shape add a unique aesthetic to the tank.
Frequently Asked Questions
Can Blue Tang live with Hillstream Loach?
Generally not recommended. Blue Tang and Hillstream Loach 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: Blue Tang wants 8.1โ8.4 and Hillstream Loach wants 6.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Blue Tang and Hillstream Loach together?
A minimum of 100 gallons is recommended for keeping Blue Tang and Hillstream Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Blue Tang and Hillstream Loach?
72โ75ยฐF (narrow) โ inside Blue Tang's 72โ82ยฐF and Hillstream Loach's 68โ75ยฐF.
Is a Blue Tang aggressive toward a Hillstream Loach?
Blue Tang is semi and Hillstream Loach is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Blue Tang and Hillstream Loach
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 180 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 300 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 350 gal | Best when keeping larger schools or reducing territorial pressure. |