Reed Tetra - Hyphessobrycon elachys

Hyphessobrycon elachys is a delicate dwarf tetra that brings subtle beauty and constant movement to planted nano aquariums. With its slender body, soft metallic sheen, and tight schooling behaviour, this species looks incredible against dark substrates, leaf litter, and lush plants. Peaceful and shy by nature, it’s best kept in groups of eight or more, where it gains confidence and shows off its natural, flowing movement through the mid?water.

Perfect for smaller, calm community tanks, Hyphessobrycon elachys pairs well with other tiny, non?boisterous species and invertebrates. They thrive in soft, slightly acidic water with gentle flow and appreciate a dimmer, more “blackwater” style setup. Easy to feed on quality micro?pellets, crushed flake, and frozen foods, they’re an ideal choice for aquarists who love understated, natural?style aquascapes.

If you want a nano fish that feels more “wild stream” than “neon billboard,” Hyphessobrycon elachys is the one that quietly steals the show.

Tank Requirements

• Minimum tank size: 40L+

• Temperature: 22–27°C

• Water: Soft, slightly acidic; gentle flow

• Environment: Planted or blackwater?style setups with shaded areas

• Group size: Keep 8–12+ for confidence and natural schooling

Diet

• High?quality micro?pellets or crushed flake

• Frozen foods: cyclops, baby brine shrimp, daphnia

• Occasional live foods to encourage colour and activity

Behaviour & Compatibility

• Peaceful, shy, tight?schooling nano tetra

• Ideal with other tiny, calm species (e.g., ember tetras, small rasboras, pygmy corys)

• Safe with shrimp and other inverts

• Avoid boisterous or fin?nipping tankmates