Emperor Tetra

The Emperor Tetra (Nematobrycon palmeri) does really well when kept in heavily planted aquariums. They may even breed on a regular basis if you have a small group of them. It's recommended to keep them in groups of 5 or more specimens. They are tetras so fin nipping may happen in the community aquarium. Keeping them in a small school should help focus their attentions on each other.

The Emperor Tetra gets to be about 1.5 inches (4.2 cm) and will adapt to a relatively wide range of water conditions regarding pH and dKH. 
Tank Size: Minimum 20 gallons, best kept in groups
Water Parameters: pH 6.0-7.5, soft to medium hardness
Temperature: 22-27°C (72-81°F)
Diet: Omnivorous; a balanced diet of high-quality flakes, pellets, and live/frozen foods
Compatibility: Suitable with other peaceful, similarly sized fish