Keyhole Cichlid and Molly Compatibility Overview
Keyhole Cichlid and Molly can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
| Factor | Keyhole Cichlid | Molly | Verdict |
|---|---|---|---|
| Temperature | 70โ82ยฐF | 72โ82ยฐF | โ 72โ82ยฐF |
| pH Range | 4.0โ7.5 | 7.5โ8.5 | โ ๏ธ 7.5โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 4.3 in | 4 in | โ Similar |
| Min. Group | 2+ | 3+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Keyhole Cichlid โ Cleithracara maronii
The Keyhole Cichlid is a popular choice for beginners due to its relatively easy care and peaceful temperament. These fish are known for their distinct keyhole marking and vibrant coloration. They do well in a community tank with other peaceful species, but should be provided with plenty of hiding spots to feel secure.
โ Full Keyhole Cichlid care guide
Molly โ Poecilia sphenops
Hardy livebearers that prefer alkaline, hard water โ sometimes slightly brackish. Prolific breeders; peaceful community fish.
Frequently Asked Questions
Can Keyhole Cichlid live with Molly?
With significant caution and a larger tank. Keyhole Cichlid and Molly can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Keyhole Cichlid and Molly together?
A minimum of 55 gallons is recommended for keeping Keyhole Cichlid and Molly together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Keyhole Cichlid and Molly?
72โ82ยฐF โ inside Keyhole Cichlid's 70โ82ยฐF and Molly's 72โ82ยฐF.
Is a Keyhole Cichlid aggressive toward a Molly?
Keyhole Cichlid is peaceful and Molly is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Keyhole Cichlid and Molly
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |