The red eye tetra (Moenkhausia sanctaefilomenae), also known as the yellow-banded moenkhausia, the yellow back moenkhausiaand the yellowhead tetra is a species of tetra.

The Red eye tetra fish prefer PH slightly acidic so they can tolerate lower PH levels down to 6.5. They prefer water temperatures of 76 °F, 25 °C, and they can grow up to 7 cm fully grown.

The red eye tetra although a type of tetra can be a very nippy fish. We would recommend not to put them with fish that have long fins. They prefer to be in groups, so groups of 5 or more is best, this can some times calm them down and stop them from nipping your fish. But this is just some times we still say they can be a little nippy.
The red eye tetra is not fussy on there food they will eat anything you put in the tank, from flake to pellets.