Commercial food is design to meet the needs of the nutrition. The fish expert provides guidelines of serving the foods in different quantity. There are different combination uses o provide the proper nutrition to the fish different serving. It is essential to give two to three serving per day as recommended by the fish experts.
I think, it is necessary to serve the commercial food as quantity specified by the experts. There are different types of brand of commercial fish foods are available in the different taste.
Normally it is advisable to choose the mixed brand products for the servicing. It is necessary to serve the food in different combination to give value added products.