Common Name(s)
Rummy-nose tetra, firehead tetra
Scientific Name
Hemigrammus rhodostomus
Family
Characidae
Origin
Lower Amazon river basin and Orinoco river basin.
Temperament
Peaceful
Maximum Size
2 inches
Minimum Tank Size
15/20 gallon with minimum base dimensions of 24 x 12
Tank Setup
Looks best in a planted tank with a dark substrate and background.
Tank Region
Middle-top
Diet
Omnivore. Will take dry foods, but supplement with mosquito larvae and other live foods.
Breeding
Egg-scatterer. Doesn't take care of its young.
Compatibility
With other temp-compatible community fish
Ease of Keeping
Fairly easy
Care
pH: Doesn't matter; Temperature: 76-80 Fahrenheit
Hemigrammus_rhodostomus.jpg

By Gavinevans - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=25353007
Here's how to tell the difference between the similar species:
tfh_rummynose_tetras.jpg

Credit: http://www.peteducation.com/article.cfm?c=16+1955&aid=2546

A schooling fish, so should be kept in groups of 6+ of their own species.

Females have rounder bodies than males.