๐Ÿ  Fish Compatibility Guide

Can Black Phantom Tetra and Congo Tetra Live Together?

Updated September 23, 2026 ยท FishCare AI Editorial Team

โœ… Compatible โ€” Compatibility Score: 85/100
85/100 โ€” Compatible

Black Phantom Tetra and Congo Tetra Compatibility Overview

Black Phantom Tetra and Congo 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 55-gallon tank is recommended to provide adequate territory and water volume for both species.

Compatibility factors for Black Phantom Tetra and Congo Tetra
FactorBlack Phantom TetraCongo TetraVerdict
Temperature68โ€“82ยฐF73โ€“82ยฐFโœ… 73โ€“82ยฐF
pH Range5.0โ€“7.06.0โ€“7.5โœ… 6.0โ€“7.0
Temperamentpeacefulpeacefulโœ… Compatible
Adult Size1.4 in3.1 inโš ๏ธ 2.2ร— difference
Min. Group8+6+See below
Min. Tank Size55 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

Black Phantom Tetra โ€” Hyphessobrycon megalopterus

Black Phantom Tetra and Congo 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

Congo Tetra โ€” Phenacogrammus interruptus

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

The Congo Tetra is a vibrant and active fish that thrives in a well-maintained freshwater aquarium. With its striking coloration and peaceful nature, it's a great addition to any community tank. This species is best kept in groups and requires a spacious tank with plenty of swimming space.

โ†’ Full Congo Tetra care guide

Frequently Asked Questions

Can Black Phantom Tetra live with Congo Tetra?

Yes, in a well-planned setup. Black Phantom Tetra and Congo 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 55-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 Congo Tetra together?

A minimum of 55 gallons is recommended for keeping Black Phantom Tetra and Congo Tetra together. A larger tank improves water stability and reduces territorial conflict.

What temperature suits both Black Phantom Tetra and Congo Tetra?

73โ€“82ยฐF โ€” inside Black Phantom Tetra's 68โ€“82ยฐF and Congo Tetra's 73โ€“82ยฐF.

Is a Black Phantom Tetra aggressive toward a Congo Tetra?

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

Related Compatibility Guides

Tank Size for Black Phantom Tetra and Congo Tetra

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

ScenarioTankWhen it applies
Minimum viable55 galOnly for the recommended minimum groups, mature filtration, and close monitoring.
Recommended community75 galAdds territory, swimming room, and a safer buffer for behavior.
Low-conflict setup125 galBest when keeping larger schools or reducing territorial pressure.