Parrot fishes are nice, and they exist with silver aro's nicely. Plus they'll add some color, a nice blood red parrot, or nice orange color, and they're big enough not fit in the aro's mouth.
Discus can also be another choice, but I hear they're a pain the you know what to maintain. 
Discus can also be another choice, but I hear they're a pain the you know what to maintain. 


