I have a Jack between 10 and 11 inches long. After some ultra violent behavior he has his own tank. Anyway its primary food is Hikari Cichlid Gold. It absolutely loves it. It usually gets two balls in the A.M. then one more in the afternoon, then one more before the lights go out. If I feed it more it starts to get quite a fat gut going on. It just doesn't seem like enough food for a fish that size to me. I have a Oscar that is a bit larger but eats a lot more food than that. The Jack is about three and a half years old so I don't think it is going to grow any more. It also seems to be in excellent health, it is very active and is well aware of its surroundings and loves to watch people in the room. So I think it is a very healthy fish. It just seems like if I feed it any more it gets "Very" fat. Just thought I would ask the pro's, do you think I am feeding it enough?