How often are you supposed to feed a pet fish? I'm a little nervous b/c both of my coworkers were out today and I fed the fish in my classroom a tiny bit this morning. I'm worried I should have put a little more in there before I left since there will be no one there to feed him til Monday. I think my coworker feeds it a wee bit once a day. I'm worried that I'm going to be responsible for killing a fish and 19 upset children. I know this sounds stupid but it's stressing me out.