๐Ÿ  Fish Compatibility Guide

Can Red Eye Tetra and Serpae Tetra Live Together?

Updated September 23, 2026 ยท FishCare AI Editorial Team

โœ… Compatible โ€” Compatibility Score: 82/100
82/100 โ€” Compatible

Red Eye Tetra and Serpae Tetra Compatibility Overview

Red Eye Tetra and Serpae Tetra can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Red Eye Tetra is semi and Serpae Tetra is semi, so give them room and cover rather than assuming they will ignore each other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.

Compatibility factors for Red Eye Tetra and Serpae Tetra
FactorRed Eye TetraSerpae TetraVerdict
Temperature72โ€“79ยฐF68โ€“82ยฐFโœ… 72โ€“79ยฐF
pH Range6.0โ€“8.05.0โ€“7.5โœ… 6.0โ€“7.5
Temperamentsemisemiโš ๏ธ Monitor
Adult Size2.8 in1.6 inโœ… Similar
Min. Group6+10+See below
Min. Tank Size20 gallons (for both species)โ€”

Compatibility Positives

A stable shared temperature range is available.
Their pH requirements overlap.

Caution Points

Both are semi, so give them a larger, well-planted tank and watch how they settle in.

Species Profiles

Red Eye Tetra โ€” Moenkhausia sanctaefilomenae

Red Eye Tetra and Serpae Tetra compatibility โ€” Red Eye Tetra

The Red Eye Tetra is a popular freshwater fish known for its vibrant red eyes and sleek, silver body. They are generally peaceful and can be kept in a community tank with other non-aggressive species. Their moderate activity level makes them suitable for a variety of aquarium setups. With proper care, they can live up to 5 years.

โ†’ Full Red Eye Tetra care guide

Serpae Tetra โ€” Hyphessobrycon eques

Red Eye Tetra and Serpae Tetra compatibility โ€” Serpae Tetra

The Serpae Tetra is a popular freshwater fish known for its vibrant coloration and peaceful nature. It is well-suited for community tanks and can be a great addition to any aquarium. With its moderate activity level and easy care requirements, it is a suitable choice for beginners and experienced aquarists alike.

โ†’ Full Serpae Tetra care guide

Frequently Asked Questions

Can Red Eye Tetra live with Serpae Tetra?

Yes, in a well-planned setup. Red Eye Tetra and Serpae Tetra can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Red Eye Tetra is semi and Serpae Tetra is semi, so give them room and cover rather than assuming they will ignore each 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 Red Eye Tetra and Serpae Tetra together?

A minimum of 20 gallons is recommended for keeping Red Eye Tetra and Serpae Tetra together. A larger tank improves water stability and reduces territorial conflict.

What temperature suits both Red Eye Tetra and Serpae Tetra?

72โ€“79ยฐF โ€” inside Red Eye Tetra's 72โ€“79ยฐF and Serpae Tetra's 68โ€“82ยฐF.

Is a Red Eye Tetra aggressive toward a Serpae Tetra?

Red Eye Tetra is semi and Serpae Tetra is semi. No major aggression issues are expected between these species.

Related Compatibility Guides

Tank Size for Red Eye Tetra and Serpae Tetra

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

ScenarioTankWhen it applies
Minimum viable27 galOnly for the recommended minimum groups, mature filtration, and close monitoring.
Recommended community40 galAdds territory, swimming room, and a safer buffer for behavior.
Low-conflict setup75 galBest when keeping larger schools or reducing territorial pressure.