For my Cichlids in a 120 gal tank I go with once every 2-3 days and have for the past 4 years. They do well with this but if I am going away (very rarely) I feed daily the week before if it is going to be a week without food. You didn't state whether it is in a bowl or a tank with mechanical filtration but if it is in a tank without a power filter less is definitely better! Also, flakes are less polluting than pellets or granules but for a large fish the floating pellets are easier to feed because you can feed as many as they will eat in a few minutes with no waste.