Can Gold Barb live with Mandarin Dragonet?
Case-by-case. Watch group sizes, tank size, and feeding zones.
Why Gold Barb and Mandarin Dragonet Don't Make an Easy Pair
They can coexist, but you need to manage the setup carefully. The temperature margin is tight — only 3°F of safe overlap, which leaves little room for thermostat drift.
Gold Barb
Puntius semifasciolatus
| Adult Size: | 3.0" |
| Temperament: | peaceful |
| Min Tank: | 20 gal |
| Temperature: | 64-77°F |
| pH Range: | 6.0-8.0 |
Mandarin Dragonet
Synchiropus splendidus
| Adult Size: | 3.0" |
| Temperament: | peaceful |
| Min Tank: | 30 gal |
| Temperature: | 74-82°F |
| pH Range: | 8.1-8.4 |
Water Parameter Overlap
| Parameter | Gold Barb | Mandarin Dragonet | Overlap |
|---|---|---|---|
| Temperature | 64-77°F | 74-82°F | 3°F ✓ |
| pH | 6.0-8.0 | 8.1-8.4 | No overlap ✗ |
Compatibility Breakdown
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
Score: 60/100 (GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Setup Requirements (for Both)
- Minimum tank: 30 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 74°F and 77°F.
- pH: no shared range. One species will be outside its tolerance regardless of what you set.
- Hiding spots: essential for Gold Barb — caves, plants, or driftwood to retreat when feeling stressed.
- Water changes: 25% weekly minimum. Two species mean double the bioload.
🔧 Tank Stocking Calculator
Enter tank size to calculate safe stocking levels:
Recommended Equipment
Based on tank size 30+ gallons:
Live copepod culture for mandarin dragonet feeding
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Gold Barb may act differently from its species average. Always observe, quarantine new arrivals for 2-4 weeks, and avoid overcrowding. If a pairing says CAUTION, start with a smaller group and a lid.