I kept little suction cupped clamps on the inside of the tank to hold the romaine leaves so they could rip chunks from it. Mine ate zucchini, pumpkin, mango, apple, pear, bloodworms, brine shrimp, romaine, mosquito larvae, pieces of earthworm and some commercial food of course. The clamps make it easy to remove if they don't like whatever you're feeding. Don't know if any of these suggestions turn the mood lights on for your fish but you never know lol