So i have an Oscar two catfish and a common algae eater. but here is the thing ill feed the Oscar, then the catfish. then when i go to feed the algae eater after lights out i will wait and then immediately i see the Oscar go an eat the algae wafer that is for the algae eater. its funny to see him fight with the wafer case its too big for his mouth but, i want to know if there is a way to "train" the Oscar to leave the wafers alone?