Compatibility Overview
Guppy and Kuhli Loach 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 40-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Guppy | Kuhli Loach | Verdict |
|---|---|---|---|
| Temperature | 72–82°F | 73–82°F | ✅ 73–82°F |
| pH Range | 6.8–8.5 | 5.5–7.0 | ⚠️ 6.8–7.0 (narrow) |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 2.5 in | 3.5 in | ✅ Similar |
| Min. Group | 3+ | 3+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Guppy — Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
Kuhli Loach — Pangio kuhlii
Eel-like bottom dwellers that are peaceful with all non-aggressive fish. Nocturnal and reclusive; need caves and soft substrate.
Frequently Asked Questions
Can Guppy live with Kuhli Loach?
Yes, in a well-planned setup. Guppy and Kuhli Loach 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 40-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Guppy and Kuhli Loach together?
A minimum of 40 gallons is recommended for keeping Guppy and Kuhli Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Guppy and Kuhli Loach?
73–82°F
Is a Guppy aggressive toward a Kuhli Loach?
Guppy is peaceful and Kuhli Loach is peaceful. pH ranges barely or do not overlap: Guppy prefers 6.8–8.5; Kuhli Loach prefers 5.5–7.0.