I just got corys about 4 days ago and it doesn't seem like they're eating. I got them Aqueon Bottom Feeder Tablets because I figured they would eat them. I broke the tablet in half figuring they wouldn't eat too much but they didn't seem to come out to eat it at all. In fact, after the other fish are done eating their food, they go for the little tablet when the corys don't seem to at all. Am I doing something wrong?