๐Ÿ  Fish Compatibility Guide

Can Guppy and X Ray Tetra Live Together?

Updated September 23, 2026 ยท FishCare AI Editorial Team

โœ… Compatible โ€” Compatibility Score: 88/100
88/100 โ€” Compatible

Guppy and X Ray Tetra Compatibility Overview

Guppy and X Ray Tetra 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.

Compatibility factors for Guppy and X Ray Tetra
FactorGuppyX Ray TetraVerdict
Temperature72โ€“82ยฐF72โ€“82ยฐFโœ… 72โ€“82ยฐF
pH Range6.8โ€“8.56.0โ€“7.5โš ๏ธ 6.8โ€“7.5 (narrow)
Temperamentpeacefulpeacefulโœ… Compatible
Adult Size2.5 in1.8 inโœ… Similar
Min. Group3+6+See below
Min. Tank Size20 gallons (for both species)โ€”

Compatibility Positives

A stable shared temperature range is available.
Temperament risk is relatively low when normal group sizes are maintained.

Caution Points

Their pH ranges overlap only partly, so aim for the shared band and keep it steady.

Species Profiles

Guppy โ€” Poecilia reticulata

Guppy and X Ray Tetra compatibility โ€” Guppy

Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.

โ†’ Full Guppy care guide

X Ray Tetra โ€” Pristella maxillaris

Guppy and X Ray Tetra compatibility โ€” X Ray Tetra

The Pristella maxillaris, also known as the X-Ray Tetra, is a popular freshwater fish known for its unique appearance and peaceful nature. They are slender and iridescent, with a clear, almost x-ray-like body. They are best kept in groups of 6 or more and thrive in well-planted tanks with a moderate water flow.

โ†’ Full X Ray Tetra care guide

Frequently Asked Questions

Can Guppy live with X Ray Tetra?

Yes, in a well-planned setup. Guppy and X Ray Tetra 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 X Ray Tetra together?

A minimum of 20 gallons is recommended for keeping Guppy and X Ray Tetra together. A larger tank improves water stability and reduces territorial conflict.

What temperature suits both Guppy and X Ray Tetra?

72โ€“82ยฐF โ€” inside Guppy's 72โ€“82ยฐF and X Ray Tetra's 72โ€“82ยฐF.

Is a Guppy aggressive toward a X Ray Tetra?

Guppy is peaceful and X Ray Tetra is peaceful. No major aggression issues are expected between these species.

Related Compatibility Guides

Tank Size for Guppy and X Ray Tetra

Use the scenario that matches the actual group sizes and temperament you plan to keep.

ScenarioTankWhen it applies
Minimum viable20 galOnly for the recommended minimum groups, mature filtration, and close monitoring.
Recommended community29 galAdds territory, swimming room, and a safer buffer for behavior.
Low-conflict setup55 galBest when keeping larger schools or reducing territorial pressure.