Can Bristlenose Pleco live with Zebra Danio?
High risk due to water mismatch, aggression, or predation.
Why Bristlenose Pleco and Zebra Danio Don't Make an Easy Pair
The size gap is 3.0" — Bristlenose Pleco (5.0") and Zebra Danio (2.0"). A fish that fits in another fish's mouth will eventually end up there.
Bristlenose Pleco
Ancistrus cirrhosus
| Adult Size: | 5.0" |
| Temperament: | peaceful |
| Min Tank: | 30 gal |
| Temperature: | 73-82°F |
| pH Range: | 6.5-7.5 |
Zebra Danio
Danio rerio
| Adult Size: | 2.0" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 64-75°F |
| pH Range: | 6.5-7.5 |
Water Parameter Overlap
| Parameter | Bristlenose Pleco | Zebra Danio | Overlap |
|---|---|---|---|
| Temperature | 73-82°F | 64-75°F | 2°F ✓ |
| pH | 6.5-7.5 | 6.5-7.5 | 1.0 ✓ |
Compatibility Breakdown
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
⚠️ Size Predation Risk: Bristlenose Pleco (5.0") vs Zebra Danio (2.0"). A 3.0" 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: 30 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 73°F and 75°F.
- pH: maintain 6.5 – 7.5.
- Hiding spots: essential for Bristlenose Pleco — 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 plecos
Explore Related Checks
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Bristlenose Pleco 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.