I've got approx 20 L104 young spread between 4 tanks (they were supposed to be L168 when I bought them) and they can't make up their mind on what they want to eat. One tank smashes algae wafers, another shrimp pellets, another cichlid pellets and the other I have no idea what they're eating. Does anyone have any suggestions on something I can feed to all without having selective diets for each tank?