So I got minnows for my bass yesterday. Before putting them in the tank I noticed his right side was bulging a little which I thought was odd because he didn't eat the day before and it was only on one side. So I continued to put the minnows in the tank. He's was chasing and eating them, but I noticed he wasn't being as aggressive towards them near the bottom of the tank. So I figured he swallowed a rock and doesn't want to make the same mistake. He ate and had a full belly, well this morning I noticed a few minnows floating at the top, then multiple dead and deteriorated ones on the bottom as if he puked them up. I need help, I don't know what to do !