Can Discus live with Guppy?
🔴 RISKY
High risk due to water mismatch, aggression, or predation.
Discus
Symphysodon aequifasciatus
| Adult Size: | 8.0" |
| Temperament: | peaceful |
| Min Tank: | 55 gal |
| Temperature: | 82-86°F |
| pH Range: | 6.0-7.0 |
Guppy
Poecilia reticulata
| Adult Size: | 2.0" |
| Temperament: | peaceful |
| Min Tank: | 10 gal |
| Temperature: | 72-82°F |
| pH Range: | 6.8-7.8 |
Water Parameter Overlap
| Parameter | Discus | Guppy | Overlap |
|---|---|---|---|
| Temperature | 82-86°F | 72-82°F | No overlap ✗ |
| pH | 6.0-7.0 | 6.8-7.8 | 0.20000000000000018 ✓ |
Why RISKY?
Temperament Match: peaceful + peaceful. Both peaceful → minimal conflict.
⚠️ Size Predation Risk: Discus (8.0") vs Guppy (2.0"). Large size difference → larger fish may eat smaller fish.
Score: 4.0/100 (RISKY threshold: GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Stocking Calculator
Enter tank size to calculate safe stocking levels:
Recommended Equipment
Based on tank size 55+ gallons:
Oase BioMaster Thermo Filter — $299.99
Premium canister filter for discus tanks
Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies. Always observe, quarantine new arrivals for 2-4 weeks, and avoid overcrowding.