You can feed every other day and that should be plenty. That will also cut down on waste buildup in the tank.
Prime Reef? Thats made by bthe same company that makes Formula 1 and 2 , right? If so it is good food but try to feed a diverse diet.
Think of this way........ would you want to eat salad for the rest of your life?
Or would you rather have a hamburger one day, pizza the next, then salad, and then a sandwich the next day?