How do i get my convict and red tailed shark to eat from the surface of the tank? I feed my fish new life spectrum pellets and algea wafers for my bristlenose pleco. But my tiger barbs eat all of the pellet food at the surface so my shark and convict dont get any. When my convict was young he used to eat from the surface with the tiger barbs, but for some reason now he just waits for the plecos algea wafer. Since the shark and convict always eat the pleocs algea wafer i started dropping in 2 hikari bottom feeder wafers along with the algea wafer so that the pleco can eat his wafer. Sorry for my bad grammar.