Characteristics: These always stay in the middle portion of the aquarium. Very fast swimmers, can be difficult to catch in a densely planted tank. However, very docile towards other tank mates. Once fully set, shows off greenish-gold colouration. I've not had any of them jumping out of open top tanks. This fish schools really tightly, compared to your regular tetras. They school with other schooling fish too.
Diet: Crushed Pellets, micro pellets, blood worms, any small pellet or flake food that fits in its mouth. Not a fussy eater. This will definitely (and has, in my tank) eat your shrimlets, be careful. However, they don't feed from bottom, unless they see a shrimplet which can be gulped.
Tank size etc: A group of 8-10 would be ok with a 2' tank with less tank mates. Excellent choice for planted tanks. Can add contrast to your existing stock of tetras, let's say, in your 3' planted tank for example. A group of 15-20 fish would look spectacular.
Tankmates: Any docile, small fish would be ok. Not as fast as Zebra danio to be used as dithers. Would be fine with mid size or small size tetras and other regular planted tank fish. Definitely a potential live feed for Angelfish (lost 8 of them like this) and other aggressive monster fish, be careful while stocking.