Compatibility Overview
Kuhli Loach and Molly can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Kuhli Loach | Molly | Verdict |
|---|---|---|---|
| Temperature | 73–82°F | 72–82°F | ✅ 73–82°F |
| pH Range | 5.5–7.0 | 7.5–8.5 | ❌ No overlap |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 3.5 in | 4 in | ✅ Similar |
| Min. Group | 3+ | 3+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Kuhli Loach — Pangio kuhlii
Eel-like bottom dwellers that are peaceful with all non-aggressive fish. Nocturnal and reclusive; need caves and soft substrate.
Molly — Poecilia sphenops
Hardy livebearers that prefer alkaline, hard water — sometimes slightly brackish. Prolific breeders; peaceful community fish.
Frequently Asked Questions
Can Kuhli Loach live with Molly?
Yes, in a well-planned setup. Kuhli Loach and Molly can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Kuhli Loach and Molly together?
A minimum of 55 gallons is recommended for keeping Kuhli Loach and Molly together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Kuhli Loach and Molly?
73–82°F
Is a Kuhli Loach aggressive toward a Molly?
Kuhli Loach is peaceful and Molly is peaceful. pH ranges barely or do not overlap: Kuhli Loach prefers 5.5–7.0; Molly prefers 7.5–8.5.