No, you may keep cleaners if you wish. I just wanted to mention they are not the saints many believe them to be. In your set-up, there should be enough food for all. They will eat all frozen foods, like their kin folk, mysis & brine.
They also eat flakes, pelletts or anything else I feed my tank and climb everywhere or on anything to get it. I have seen them in tug of war fights, with serpent stars over a piece of food.