A friend of mine has six 4" Uaru's that are getting ready to go in a 500 gallon tank along with 13 Synodontis and some Chocolate cichlids. Uaru's are so cool!
2 uaru A. here.
hopefully getting one monster tank of 6x2.5x2.5 and putting either a green asian arow or silver arow in. wife said i can get one huge tank as long as i sacrifice the 2nd tank i originally planned. the arowanas should be a nice contrast against my uaru.