Common Name(s)
Costello tetra, January tetra, green neon tetra
Scientific Name
Hemigrammus hyanuary
Family
Characidae
Origin
Amazon river basin
Temperament
Peaceful
Maximum Size
1.8 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
Unfussy eater, will take most foods.
Breeding
Egg-scatterer, doesn't take care of it's young.
Compatibility
With peaceful, temp-compatible community fish that are not too active so as to outcompete them.
Ease of Keeping
Easy
Care
pH: Doesn't matter; Temperature: 73-80 Fahrenheit
Hemigrammus_hyanuary_thomnight_001.jpg

By Thomnight (Thomnight) - self-made, eigenes Werk, CC BY-SA 2.0 de, https://commons.wikimedia.org/w/index.php?curid=2637808

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

Males are smaller and slimmer than females. Males also have a small hook on their anal fin.

They are also known as the green neon, which is also what Paracheirodon simulans is known as.