*** decided to only keep 2 mbuna species in my 55g to avoid any aggression issues. it currently has: 5 cynotilapia afra(1m:4f, im pretty sure), 4 marmalade fuelleborni (1m:3f), 1 small red tail shark and a small bristlenose pleco. i was just wondering everyone opinions on this stock, could i add anything else? im interested in some sort of cat fish, upside-down maybe? if so how many? any opinions and suggestions are appreciated, thanks.