๐Ÿ  Fish Compatibility Guide

Can Black Ruby Barb and Peacock Cichlid Live Together?

Updated September 23, 2026 ยท FishCare AI Editorial Team

โš ๏ธ Use Caution โ€” Compatibility Score: 63/100
63/100 โ€” Use Caution

Black Ruby Barb and Peacock Cichlid Compatibility Overview

Black Ruby Barb and Peacock Cichlid can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.

Compatibility factors for Black Ruby Barb and Peacock Cichlid
FactorBlack Ruby BarbPeacock CichlidVerdict
Temperature68โ€“81ยฐF73โ€“84ยฐFโœ… 73โ€“81ยฐF
pH Range5.5โ€“7.57.5โ€“9.0โš ๏ธ 7.5โ€“7.5 (narrow)
Temperamentpeacefulsemiโš ๏ธ Monitor
Adult Size2.2 in5.1 inโš ๏ธ 2.3ร— difference
Min. Group6+4+See below
Min. Tank Size75 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 Ruby Barb โ€” Pethia nigrofasciata

Black Ruby Barb and Peacock Cichlid compatibility โ€” Black Ruby Barb

The Black Ruby Barb is a vibrant, active species suitable for beginners. It requires a spacious tank and a school of its own kind to thrive. Its striking colors and lively nature make it a popular choice.

โ†’ Full Black Ruby Barb care guide

Peacock Cichlid โ€” Aulonocara stuartgranti

Black Ruby Barb and Peacock Cichlid compatibility โ€” Peacock Cichlid

The Peacock Cichlid, Aulonocara nyassae, is a stunning fish with vibrant blue and yellow colors. These fish are known for their aggression and require a mature and well-maintained tank. They are best kept in pairs or in a species-specific tank. Careful attention must be given to water parameters and tank setup to ensure their health and well-being.

โ†’ Full Peacock Cichlid care guide

Frequently Asked Questions

Can Black Ruby Barb live with Peacock Cichlid?

With significant caution and a larger tank. Black Ruby Barb and Peacock Cichlid can potentially coexist, but the combination requires careful attention. Their usable pH overlap is narrow and requires stable, tested water. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.

What tank size do I need for Black Ruby Barb and Peacock Cichlid together?

A minimum of 75 gallons is recommended for keeping Black Ruby Barb and Peacock Cichlid together. A larger tank improves water stability and reduces territorial conflict.

What temperature suits both Black Ruby Barb and Peacock Cichlid?

73โ€“81ยฐF โ€” inside Black Ruby Barb's 68โ€“81ยฐF and Peacock Cichlid's 73โ€“84ยฐF.

Is a Black Ruby Barb aggressive toward a Peacock Cichlid?

Black Ruby Barb is peaceful and Peacock Cichlid is semi. No major aggression issues are expected between these species.

Related Compatibility Guides

Tank Size for Black Ruby Barb and Peacock Cichlid

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

ScenarioTankWhen it applies
Minimum viable75 galOnly for the recommended minimum groups, mature filtration, and close monitoring.
Recommended community125 galAdds territory, swimming room, and a safer buffer for behavior.
Low-conflict setup150 galBest when keeping larger schools or reducing territorial pressure.