Can Neon Tetra live with Silver Dollar?
High risk due to water mismatch, aggression, or predation.
Why Neon Tetra and Silver Dollar Don't Make an Easy Pair
The size gap is 4.8" — Neon Tetra (1.2") and Silver Dollar (6.0"). A fish that fits in another fish's mouth will eventually end up there.
Neon Tetra
Paracheirodon innesi
| Adult Size: | 1.2" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 68-77°F |
| pH Range: | 5.5-7.0 |
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 | Neon Tetra | Silver Dollar | Overlap |
|---|---|---|---|
| Temperature | 68-77°F | 75-82°F | 2°F ✓ |
| pH | 5.5-7.0 | 6.0-7.5 | 1.0 ✓ |
Compatibility Breakdown
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
⚠️ Size Predation Risk: Neon Tetra (1.2") vs Silver Dollar (6.0"). A 4.8" gap — the larger fish will view the smaller fish as food.
Score: 40.0/100 (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 – 7.0.
- Hiding spots: essential for Neon Tetra — 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
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Neon Tetra 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.