๐Ÿ  Fish Compatibility Guide

Can Black Phantom Tetra and Pea Puffer Live Together?

Updated September 23, 2026 ยท FishCare AI Editorial Team

โš ๏ธ Use Caution โ€” Compatibility Score: 65/100
65/100 โ€” Use Caution

Black Phantom Tetra and Pea Puffer Compatibility Overview

Black Phantom Tetra and Pea Puffer can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 20 gallons), dense planting, and close monitoring are essential.

Compatibility factors for Black Phantom Tetra and Pea Puffer
FactorBlack Phantom TetraPea PufferVerdict
Temperature68โ€“82ยฐF74โ€“82ยฐFโœ… 74โ€“82ยฐF
pH Range5.0โ€“7.07.0โ€“8.0โš ๏ธ 7.0โ€“7.0 (narrow)
Temperamentpeacefulsemiโš ๏ธ Monitor
Adult Size1.4 in1 inโœ… Similar
Min. Group8+1+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 usable pH overlap is narrow and requires stable, tested water.

Species Profiles

Black Phantom Tetra โ€” Hyphessobrycon megalopterus

Black Phantom Tetra and Pea Puffer 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

Pea Puffer โ€” Carinotetraodon travancoricus

Black Phantom Tetra and Pea Puffer compatibility โ€” Pea Puffer

World's smallest pufferfish โ€” intensely territorial and nippy despite tiny size. Will attack fins and eat shrimp and snails.

โ†’ Full Pea Puffer care guide

Frequently Asked Questions

Can Black Phantom Tetra live with Pea Puffer?

With significant caution and a larger tank. Black Phantom Tetra and Pea Puffer can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 20 gallons), dense planting, and close monitoring are essential.

What tank size do I need for Black Phantom Tetra and Pea Puffer together?

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

What temperature suits both Black Phantom Tetra and Pea Puffer?

74โ€“82ยฐF โ€” inside Black Phantom Tetra's 68โ€“82ยฐF and Pea Puffer's 74โ€“82ยฐF.

Is a Black Phantom Tetra aggressive toward a Pea Puffer?

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

Related Compatibility Guides

Tank Size for Black Phantom Tetra and Pea Puffer

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.