Guppy and Hillstream Loach Compatibility Overview
Guppy and Hillstream Loach can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Guppy | Hillstream Loach | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 68โ75ยฐF | โ ๏ธ 72โ75ยฐF (narrow) |
| pH Range | 6.8โ8.5 | 6.0โ7.5 | โ ๏ธ 6.8โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.5 in | 2.6 in | โ Similar |
| Min. Group | 3+ | 4+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Guppy โ Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
Hillstream Loach โ Sewellia lineolata
Sewellia lineolata, known as the Hillstream Loach, is a fascinating species for aquarists. These fish require a well-oxygenated, clear water environment with plenty of hiding spots. With a lifespan of 7 years, they are a long-term commitment. Their olive green color and slender body shape add a unique aesthetic to the tank.
Frequently Asked Questions
Can Guppy live with Hillstream Loach?
Yes, in a well-planned setup. Guppy and Hillstream Loach can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Guppy and Hillstream Loach together?
A minimum of 20 gallons is recommended for keeping Guppy and Hillstream Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Guppy and Hillstream Loach?
72โ75ยฐF (narrow) โ inside Guppy's 72โ82ยฐF and Hillstream Loach's 68โ75ยฐF.
Is a Guppy aggressive toward a Hillstream Loach?
Guppy is peaceful and Hillstream Loach is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Guppy and Hillstream Loach
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 20 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |