i'm fostering a rainbow shark for a friend and want to make sure i'm taking good care of it. i currently feed flakes and small pellets on alternating days and algae wafers once a day five days a week (tank is at my office so i'm not usually there on weekends), with fresh zucchini once a week and freeze dried brine shrimp once a week too. what should i change to accommodate the shark? will it eat any pellets or flakes that make it to the bottom?