Ok, Featherfin Synodontis are great scavengers and fit well with Mbuna. There is also other species of Synodontis but be careful what you choose some get huge, Featherfins max out at about 8 inches. Second a "dither" fish is a fish or fish used to ease a skittish or timid fish. They help to make other timid fish more comfortable with their surroundings....
_________________
"There he goes - one of God's own prototypes -
a high powered mutant of some kind never even considered for mass production.
Too weird to live, and too rare to die".
Fear and Loathing in Las Vegas