Can Gold Barb live with Silver Dollar?
Case-by-case. Watch group sizes, tank size, and feeding zones.
Why Gold Barb and Silver Dollar Don't Make an Easy Pair
They can coexist, but you need to manage the setup carefully. The temperature margin is tight — only 2°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 |
Silver Dollar
Metynnis argenteus
| Adult Size: | 6.0" |
| Temperament: | peaceful |
| Min Tank: | 55 gal |
| Temperature: | 75-82°F |
| pH Range: | 6.0-7.5 |
Water Parameter Overlap
| Parameter | Gold Barb | Silver Dollar | Overlap |
|---|---|---|---|
| Temperature | 64-77°F | 75-82°F | 2°F ✓ |
| pH | 6.0-8.0 | 6.0-7.5 | 1.5 ✓ |
Compatibility Breakdown
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
⚠️ Size Predation Risk: Gold Barb (3.0") vs Silver Dollar (6.0"). A 3.0" gap — the larger fish will view the smaller fish as food.
Score: 50.0/100 (GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Setup Requirements (for Both)
- Minimum tank: 55 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 75°F and 77°F.
- pH: maintain 6.0 – 7.5.
- 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 55+ gallons:
Herbivore sinking rounds for plant-eating fish
Explore Related Checks
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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.