๐Ÿ  Fish Compatibility Guide

Can Black Phantom Tetra and Diamond Tetra Live Together?

Updated September 23, 2026 ยท FishCare AI Editorial Team

โœ… Compatible โ€” Compatibility Score: 96/100
96/100 โ€” Compatible

Black Phantom Tetra and Diamond Tetra Compatibility Overview

Black Phantom Tetra and Diamond 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 Black Phantom Tetra and Diamond Tetra
FactorBlack Phantom TetraDiamond TetraVerdict
Temperature68โ€“82ยฐF75โ€“82ยฐFโœ… 75โ€“82ยฐF
pH Range5.0โ€“7.05.5โ€“7.0โœ… 5.5โ€“7.0
Temperamentpeacefulpeacefulโœ… Compatible
Adult Size1.4 in2.4 inโœ… Similar
Min. Group8+6+See below
Min. Tank Size20 gallons (for both species)โ€”

Compatibility Positives

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

Caution Points

No major compatibility issues identified for this pair.

Species Profiles

Black Phantom Tetra โ€” Hyphessobrycon megalopterus

Black Phantom Tetra and Diamond Tetra compatibility โ€” Black Phantom Tetra

The Black Phantom Tetra is a popular freshwater fish known for its striking black and silver coloration. It is generally peaceful and can be kept in a community tank with other non-aggressive species. They require a well-maintained tank with a moderate water flow and a good cover of plants.

โ†’ Full Black Phantom Tetra care guide

Diamond Tetra โ€” Moenkhausia pittieri

Black Phantom Tetra and Diamond Tetra compatibility โ€” Diamond Tetra

The Diamond Tetra is a popular freshwater fish known for its vibrant colors and peaceful nature. It is well-suited for community tanks and can thrive in a variety of water conditions. With a moderate activity level and a preference for schools, this species is a great addition to any beginner or intermediate aquarist's tank.

โ†’ Full Diamond Tetra care guide

Frequently Asked Questions

Can Black Phantom Tetra live with Diamond Tetra?

Yes, in a well-planned setup. Black Phantom Tetra and Diamond 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 Black Phantom Tetra and Diamond Tetra together?

A minimum of 20 gallons is recommended for keeping Black Phantom Tetra and Diamond Tetra together. A larger tank improves water stability and reduces territorial conflict.

What temperature suits both Black Phantom Tetra and Diamond Tetra?

75โ€“82ยฐF โ€” inside Black Phantom Tetra's 68โ€“82ยฐF and Diamond Tetra's 75โ€“82ยฐF.

Is a Black Phantom Tetra aggressive toward a Diamond Tetra?

Black Phantom Tetra is peaceful and Diamond Tetra is peaceful. No major aggression issues are expected between these species.

Related Compatibility Guides

Tank Size for Black Phantom Tetra and Diamond 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.