Red Rainbowfish

The Red Rainbowfish, also known as the Salmon Red Rainbowfish, is a spectacular species native to Lake Sentani in West Papua, Indonesia. Males develop an intense, uniform red coloration across their entire body that is truly stunning when maintained in optimal conditions. Unlike many rainbowfish that have multiple colors, Red Rainbowfish focus on perfecting one spectacular color - a brilliant, saturated red that covers their streamlined bodies. They have the classic rainbowfish shape with large scales and two dorsal fins, but their coloration is what truly sets them apart. Females remain more silvery with hints of red. These active swimmers need plenty of space to display their colors and engage in their characteristic lateral displays during courtship. When kept in groups in spacious tanks with good water quality, their red coloration becomes almost luminous, making them one of the most impressive rainbowfish species available to dedicated aquarists.

Care Requirements

Tank Setup

Red Rainbowfish require a spacious tank of 40-55 gallons with ample swimming room. Provide open areas for their active swimming along with some planting along the back and sides. Use moderate to strong filtration with good water flow. Dark substrate and background make their red coloration pop. Ensure excellent water quality for maintaining their vibrant colors.

Water Quality

• Temperature: 75-82°F (24-28°C)
• pH: 7.0-8.0 (alkaline preferred)
• Water Hardness: Moderate to hard, 8-20 dGH
• Ammonia/Nitrite: 0 ppm
• Nitrate: <20 ppm

Feeding

These omnivores accept a varied diet of high-quality flakes, pellets, and frozen or live foods. They benefit from vegetable matter and color-enhancing foods that bring out their red hues. Supplement with bloodworms and brine shrimp. Feed twice daily with portions they can consume in 2-3 minutes.

Behavior & Compatibility

Red Rainbowfish are peaceful schooling fish that should be kept in groups of 6 or more with a higher ratio of females to males. They are suitable for community tanks with other peaceful, medium to large-sized fish. Their active swimming and brilliant coloration make them a centerpiece for larger community aquariums.

Tips for Success

• Keep in schools of 6+; males show best colors when competing for females
• Their red coloration intensifies with age and proper nutrition
• Maintain slightly alkaline water with regular water changes
• Provide open swimming space; cramped conditions stress them and fade colors
• Color-enhancing foods help maintain their brilliant red appearance
• Can be kept with other rainbowfish species for a spectacular display
• Pristine water quality is essential for their color development