The Congo Tetra, scientifically known as Phenacogrammus interruptus, is a dazzling freshwater fish native to the Congo River Basin in Central Africa. Known for its shimmering, iridescent scales and flowing fins, this tetra is a popular choice for aquarists seeking a vibrant and peaceful schooling fish for community aquariums. Its dynamic colors and active schooling behavior make it an eye-catching addition to well-maintained setups.

Physical Description:

The Congo Tetra displays a remarkable array of iridescent colors, including shades of blue, green, gold, and violet, which shimmer in the light. Males are particularly striking, with larger, flowing dorsal and tail fins edged in white or light blue, giving them an almost regal appearance. Females are slightly smaller and less vibrantly colored but still maintain the species’ characteristic shimmer. Adults typically grow to about 3 to 3.5 inches (7.5 to 9 centimeters) in length, making them one of the larger tetra species.

Aquarium Care:

Congo Tetras are active and peaceful schooling fish that thrive in groups of at least six individuals. A tank of 40 gallons or more is recommended to provide ample swimming space for a school. The tank should be well-planted with open areas for swimming, and driftwood or rocks can be added to create a natural environment. A dark substrate and subdued lighting will enhance the tetra’s iridescent colors, creating a visually stunning display.

Water Parameters:

To replicate the natural habitat of the Congo Tetra, maintain slightly acidic to neutral water conditions with a pH range of 6.0 to 7.5 and a temperature between 74 to 82°F (23 to 28°C). These fish prefer soft to moderately hard water. Regular water changes and efficient filtration are essential, as Congo Tetras are sensitive to poor water quality.

Feeding:

Congo Tetras are omnivorous and easy to feed. They thrive on a varied diet that includes high-quality flakes or pellets, supplemented with live or frozen foods such as bloodworms, brine shrimp, and daphnia. Offering a mix of plant-based foods and proteins will help maintain their vibrant coloration and overall health.

Temperament and Tank Mates:

Congo Tetras are peaceful and ideal for community tanks with similarly sized, non-aggressive fish. Suitable tank mates include other tetras, rasboras, gouramis, and bottom-dwelling species like Corydoras catfish and small plecos. Avoid keeping them with fin-nipping or aggressive species, as their long fins can make them a target. Keeping them in a school also reduces stress and encourages natural behavior.

Breeding:

Breeding Congo Tetras in captivity is achievable with the right conditions. They are egg scatterers, and spawning can be encouraged by conditioning the pair with live or frozen foods. A separate breeding tank with fine-leaved plants or a spawning mop is recommended, as the adults may eat the eggs. The eggs hatch within 24 to 36 hours, and the fry become free-swimming after about 3 to 4 days. The fry can be fed infusoria or finely powdered fry food before transitioning to baby brine shrimp.

Overall:

The Congo Tetra (Phenacogrammus interruptus) is a stunning and peaceful fish that adds color, movement, and elegance to any community aquarium. With proper care, a suitable tank environment, and a varied diet, these tetras can thrive and display their full spectrum of iridescent colors, making them a highlight in any freshwater setup. Their schooling nature and striking appearance make them a rewarding choice for aquarists of all experience levels.

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