Can Yellow Tang Live With Hillstream Loach?
Incompatible pH. Yellow Tang needs 8.1–8.4, Hillstream Loach needs 6.5–7.5.
Parameter Comparison
| Parameter | Yellow Tang | Hillstream Loach | Overlap |
|---|---|---|---|
| Temperature | 75–82°F | 65–75°F | 75–75°F ✓ |
| pH Range | 8.1–8.4 | 6.5–7.5 | No overlap ✗ |
| Temperament | semi-aggressive | peaceful | Monitor ⚠ |
| Max Size | 8" | 3" | Similar ✓ |
| Min Tank Size | 75 gal | 20 gal | 75 gal minimum together |
| Diet | Herbivore | Herbivore | — |
| Care Level | intermediate | intermediate | — |
Species Profiles
Yellow Tang
Zebrasoma flavescens
The yellow tang is the most iconic reef tank fish — a solid lemon-yellow disc that constantly grazes algae across the rock work. They are active, hardy, and excellent algae controllers for reef tanks. However, they need large tanks (75+ gallons minimum), can be aggressive toward similar-shaped fish, and have become significantly more expensive following collection bans in Hawaii.
Full care guide →Hillstream Loach
Sewellia lineolata
Hillstream loaches are fascinating flat-bodied fish that resemble tiny stingrays. They are specialized for life in fast-flowing, oxygen-rich streams and use their modified pelvic and pectoral fins to grip smooth rocks in strong current. Their unique appearance, algae-eating habits, and cool-water preference make them popular with experienced fishkeepers looking for something different.
Full care guide →