The food is split into three sizes #1,#2, and #3. #1 is the smallest size for fish in the alevin stage. #2 is a little thicker than #1 and the fish will use this food in the fry stage. Lastly, food #3 is for the fish when they get to the fingerling stage. The less food the better so there isn't a lot of food decaying which could affect the nitrogen cuycle