Can Swordtail live with White Cloud Minnow?
High risk due to water mismatch, aggression, or predation.
Why Swordtail and White Cloud Minnow Don't Make an Easy Pair
The size gap is 3.5" — Swordtail (5.0") and White Cloud Minnow (1.5"). A fish that fits in another fish's mouth will eventually end up there.
Swordtail
Xiphophorus helleri
| Adult Size: | 5.0" |
| Temperament: | semi-aggressive |
| Min Tank: | 20 gal |
| Temperature: | 72-78°F |
| pH Range: | 7.0-8.0 |
White Cloud Minnow
Tanichthys albonubes
| Adult Size: | 1.5" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 60-75°F |
| pH Range: | 6.0-8.0 |
Water Parameter Overlap
| Parameter | Swordtail | White Cloud Minnow | Overlap |
|---|---|---|---|
| Temperature | 72-78°F | 60-75°F | 3°F ✓ |
| pH | 7.0-8.0 | 6.0-8.0 | 1.0 ✓ |
Compatibility Breakdown
Temperament Match: semi-aggressive + peaceful. Semi-aggressive → watch territory and feeding.
⚠️ Size Predation Risk: Swordtail (5.0") vs White Cloud Minnow (1.5"). A 3.5" 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: 20 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 72°F and 75°F.
- pH: maintain 7.0 – 8.0.
- Hiding spots: essential for Swordtail — 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 20+ gallons:
LED filter for livebearer tanks
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a semi-aggressive individual Swordtail 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.