Can Firemouth Cichlid live with Kribensis?
Case-by-case. Watch group sizes, tank size, and feeding zones.
Why Firemouth Cichlid and Kribensis Don't Make an Easy Pair
They can coexist, but you need to manage the setup carefully. The temperament combination (semi-aggressive+semi-aggressive) can work, but you will need to watch them at feeding time for the first week.
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 |
Kribensis
Pelvicachromis pulcher
| Adult Size: | 4.0" |
| Temperament: | semi-aggressive |
| Min Tank: | 20 gal |
| Temperature: | 75-82°F |
| pH Range: | 6.0-7.5 |
Water Parameter Overlap
| Parameter | Firemouth Cichlid | Kribensis | Overlap |
|---|---|---|---|
| Temperature | 75-86°F | 75-82°F | 7°F ✓ |
| pH | 6.5-8.0 | 6.0-7.5 | 1.0 ✓ |
Compatibility Breakdown
Temperament Match: semi-aggressive + semi-aggressive. Semi-aggressive → watch territory and feeding.
⚠️ Size Predation Risk: Firemouth Cichlid (6.0") vs Kribensis (4.0"). A 2.0" 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 75°F and 82°F.
- pH: maintain 6.5 – 7.5.
- Hiding spots: essential for Firemouth Cichlid — 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 semi-aggressive individual Firemouth Cichlid 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.