Red Phantom Tetra (Hyphessobrycon sweglesi)

The Red Phantom Tetra (Hyphessobrycon sweglesi) is a gorgeous small tetra from Colombia and Venezuela, native to the Orinoco and Meta River systems. Its deep-bodied, compressed form and overall rosy-red to orange-red coloration, accented by a dark humeral spot and a long black dorsal fin in males, make it one of the more elegant phantom tetras in the hobby.

Red Phantom Tetras are closely related to the Black Phantom Tetra (H. megalopterus) and share similar care requirements. They prefer soft, slightly acidic water and appreciate a well-planted aquarium with subdued lighting that helps intensify their red coloration. Tannin-stained water from driftwood or Indian almond leaves is beneficial.

This species is peaceful and sociable, best kept in schools of 6 or more. In groups, males display extended dorsal fins and heightened coloration, making a dramatic visual impression. They occupy the mid-water zone and mix well with other small South American tetras, rasboras, and dwarf cichlids.

Red Phantom Tetras are relatively easy to keep compared to some other small tetras. They accept a wide range of prepared foods and are not demanding about water chemistry within reasonable ranges. Their modest size and peaceful nature make them suitable for nano to medium planted aquariums.

Water Parameters: Soft to moderately soft water is preferred: pH 5.5–7.0, temperature 22–28°C, GH 2–10. Softer, slightly acidic water enhances coloration. Adding driftwood or Indian almond leaves to produce tannins is beneficial. Avoid alkaline or very hard water.

Tank Setup: Minimum 60 liters for a school of 6. A planted aquarium with darker substrate and subdued or dappled lighting showcases their red coloration best. Floating plants that filter light, driftwood for tannins, and fine-leafed background plants provide a natural environment.

Feeding: Omnivores that accept high-quality micro flake food, micro pellets, and small frozen or live foods including bloodworm, daphnia, and brine shrimp. Feed twice daily in small amounts. Varied diet improves coloration.

Tankmates: Excellent community fish with other small peaceful species: Cardinals, Neons, Rummy Nose Tetras, small rasboras, Corydoras, and dwarf cichlids like Apistogramma. Avoid large or aggressive fish.

Health: Generally hardy once acclimated. Sensitive to poor water quality and abrupt parameter changes. Perform weekly water changes of 25–30%. Watch for ich, velvet, and neon tetra disease. Maintain stable soft, acidic conditions for best long-term health.