Can Kribensis live with Silver Dollar?
These two species are usually compatible in community tanks.
Why Kribensis and Silver Dollar Work
These two species overlap in both temperature (75–82°F overlap) and pH (6.0-7.5 overlap range). Their temperature tolerances are close enough, and neither fish pushes the pH so far outside the other's comfort zone that it creates chronic stress. The temperament match (semi-aggressive + peaceful) is low-conflict. In a 55+ gallon tank with adequate hiding spots, these two can coexist with minimal problems.
Kribensis
Pelvicachromis pulcher
| Adult Size: | 4.0" |
| Temperament: | semi-aggressive |
| Min Tank: | 20 gal |
| Temperature: | 75-82°F |
| pH Range: | 6.0-7.5 |
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 | Kribensis | Silver Dollar | Overlap |
|---|---|---|---|
| Temperature | 75-82°F | 75-82°F | 7°F ✓ |
| pH | 6.0-7.5 | 6.0-7.5 | 1.5 ✓ |
Compatibility Breakdown
Temperament Match: semi-aggressive + peaceful. Semi-aggressive → watch territory and feeding.
⚠️ Size Predation Risk: Kribensis (4.0") vs Silver Dollar (6.0"). A 2.0" gap — the larger fish will view the smaller fish as food.
Score: 90.0/100 (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 82°F.
- pH: maintain 6.0 – 7.5.
- Hiding spots: essential for Kribensis — 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 semi-aggressive individual Kribensis 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.