Can Firemouth Cichlid live with Flowerhorn?
These two species are usually compatible in community tanks.
Why Firemouth Cichlid and Flowerhorn Work
These two species overlap in both temperature (78–86°F overlap) and pH (6.5-8.0 overlap range). Their temperature tolerances are close enough, and neither fish pushes the pH so far outside the other's comfort zone that it creates chronic stress. The temperament match (semi-aggressive + aggressive) is low-conflict. In a 75+ gallon tank with adequate hiding spots, these two can coexist with minimal problems.
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 |
Flowerhorn
Amphilophus hybrid
| Adult Size: | 12.0" |
| Temperament: | aggressive |
| Min Tank: | 75 gal |
| Temperature: | 78-86°F |
| pH Range: | 6.5-8.0 |
Water Parameter Overlap
| Parameter | Firemouth Cichlid | Flowerhorn | Overlap |
|---|---|---|---|
| Temperature | 75-86°F | 78-86°F | 8°F ✓ |
| pH | 6.5-8.0 | 6.5-8.0 | 1.5 ✓ |
Compatibility Breakdown
Temperament Match: semi-aggressive + aggressive. One aggressive → predation/nipping risk.
⚠️ Size Predation Risk: Firemouth Cichlid (6.0") vs Flowerhorn (12.0"). A 6.0" gap — the larger fish will view the smaller fish as food.
⚠️ Diet Conflict: A carnivore sharing water with a fish small enough to fit in its mouth is a waiting game. Feed generously, but the risk is structural — not something you can manage meal by meal.
Score: 85.0/100 (GOOD ≥80, CAUTION ≥50, RISKY <50).
🔧 Tank Setup Requirements (for Both)
- Minimum tank: 75 gallons — sized for the larger fish in the pair.
- Temperature: keep it between 78°F and 86°F.
- pH: maintain 6.5 – 8.0.
- 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 75+ gallons:
Large pellet food for big cichlids like flowerhorn
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.