Bristlenose Pleco and Guppy Compatibility Overview
Bristlenose Pleco and Guppy 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 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Bristlenose Pleco | Guppy | Verdict |
|---|---|---|---|
| Temperature | 60โ80ยฐF | 72โ82ยฐF | โ 72โ80ยฐF |
| pH Range | 6.5โ7.5 | 6.8โ8.5 | โ ๏ธ 6.8โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 5 in | 2.5 in | โ ๏ธ 2.0ร difference |
| Min. Group | 1+ | 3+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Bristlenose Pleco โ Ancistrus sp.
Hardy armoured catfish that grazes on algae. Peaceful with virtually all species; tolerates a wide temperature range.
โ Full Bristlenose Pleco care guide
Guppy โ Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
Frequently Asked Questions
Can Bristlenose Pleco live with Guppy?
Yes, in a well-planned setup. Bristlenose Pleco and Guppy 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 55-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Bristlenose Pleco and Guppy together?
A minimum of 55 gallons is recommended for keeping Bristlenose Pleco and Guppy together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Bristlenose Pleco and Guppy?
72โ80ยฐF โ inside Bristlenose Pleco's 60โ80ยฐF and Guppy's 72โ82ยฐF.
Is a Bristlenose Pleco aggressive toward a Guppy?
Bristlenose Pleco is peaceful and Guppy is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Bristlenose Pleco and Guppy
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. |