Can Guppy live with Weather Loach?
Case-by-case. Watch group sizes, tank size, and feeding zones.
Why Guppy and Weather Loach Don't Make an Easy Pair
They can coexist, but you need to manage the setup carefully. The temperament combination (peaceful+peaceful) can work, but you will need to watch them at feeding time for the first week.
Guppy
Poecilia reticulata
| Adult Size: | 2.0" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 72-82°F |
| pH Range: | 6.8-7.8 |
Weather Loach
Misgurnus anguillicaudatus
| Adult Size: | 10.0" |
| Temperament: | peaceful |
| Min Tank: | 30 gal |
| Temperature: | 50-77°F |
| pH Range: | 6.0-8.0 |
Water Parameter Overlap
| Parameter | Guppy | Weather Loach | Overlap |
|---|---|---|---|
| Temperature | 72-82°F | 50-77°F | 5°F ✓ |
| pH | 6.8-7.8 | 6.0-8.0 | 1.0 ✓ |
Compatibility Breakdown
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
⚠️ Size Predation Risk: Guppy (2.0") vs Weather Loach (10.0"). A 8.0" gap — the larger fish will view the smaller fish as food.
Score: 70.0/100 (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 72°F and 77°F.
- pH: maintain 6.8 – 7.8.
- Hiding spots: essential for Guppy — 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:
Sinking wafers for loaches and bottom feeders
Explore Related Checks
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Guppy 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.