Can Corydoras Catfish live with Firemouth Cichlid?
High risk due to water mismatch, aggression, or predation.
Why Corydoras Catfish and Firemouth Cichlid Don't Make an Easy Pair
The size gap is 3.2" — Corydoras Catfish (2.8") and Firemouth Cichlid (6.0"). A fish that fits in another fish's mouth will eventually end up there.
Corydoras Catfish
Corydoras aeneus
| Adult Size: | 2.8" |
| Temperament: | peaceful |
| Min Tank: | 20 gal |
| Temperature: | 72-78°F |
| pH Range: | 6.0-7.5 |
Firemouth Cichlid
Thorichthys meeki
| Adult Size: | 6.0" |
| Temperament: | semi-aggressive |
| Min Tank: | 30 gal |
| Temperature: | 75-86°F |
| pH Range: | 6.5-8.0 |
Water Parameter Overlap
| Parameter | Corydoras Catfish | Firemouth Cichlid | Overlap |
|---|---|---|---|
| Temperature | 72-78°F | 75-86°F | 3°F ✓ |
| pH | 6.0-7.5 | 6.5-8.0 | 1.0 ✓ |
Compatibility Breakdown
Temperament Match: peaceful + semi-aggressive. Semi-aggressive → watch territory and feeding.
⚠️ Size Predation Risk: Corydoras Catfish (2.8") vs Firemouth Cichlid (6.0"). A 3.2" 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 75°F and 78°F.
- pH: maintain 6.5 – 7.5.
- Hiding spots: essential for Corydoras Catfish — 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:
Floating pellet for medium cichlids
Explore Related Checks
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Accuracy note: This tool uses expert rules + FishBase.org data. Individual fish behavior varies — a peaceful individual Corydoras Catfish 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.