The black neon tetra is a small, beautiful fish that fish keepers of all experience levels should consider. These fish are a variant of the popular neon tetra, but most people overlook this less colorful variety. So, what is a neon black tetra and what makes it such a unique breed? Flickr Black Neon Tetra Overview Before we look at the details of this mesmerizing breed, here's an overview of its qualities and care requirements. Family Characidae Origin Brazil Lifespan Up to 5 years Temperament Gentle and passive Size About 1.5 inches long Minimum Tank Size 10 gallons Diet Omnivore Breeding Egg-layer pH 5.5 to 7.5 Hardness About 6 dGH Temperature 73 to 81 degrees Fahrenheit Beginner-Friendly? Yes