Newbee, my fish consulsant told me about Aquamax which I believe is a Purina Product. True to all above about different sizes. I buy Aquamax 5D09, it is small enough for my Coppernose bluegill. Its a floating pellet that is small enough for the small fish to mouth untill soft and bigger ones just take it under. It is 36%. My cost here in central Texas is around $15.20 fpr 50 lb. bag Hope this helped.