if I was able to pretend you did not have the id sharks, I would say stay with community fish. Throw a few more barbs, maybe a small shoal of another species such as golden or rosy. Maybe a three spot gourmi or two. A few cory cats would be cool too. But you have the sharks so I really wouldn't add anything til those find a proper home. Sorry to be the bearer of the truth. 10 gallon is really two small for much. You could set it up with a handful of neons and a couple cories. Or keep it as a quarantine tank. You can feed you fish blood worms a few times a week. Your barbs will love them. Really any of the frozen fish foods will be gobbled up. High quality flakes or tetra bites will work as a staple.