I found this fish food in PetCo. I've been taking a look at the ingredients and these in particular do not contain corn ingredients. The first items listed under ingredients are Whole Fish Meal, Whole Wheat Flour, Wheat Gluten Meal, Soybean Meal, etc. Nutrition Information includes "Crude Protein (min.) 42%, Crude Fat (min.) 8%, Crude Fiber (max.) 3%, Moisture (max.) 9%, Phosphorus (min.) 1%." These bags are not available in sizes bigger than 8 oz and they cost up to 5 bucks. What I found in the cheaper more popular brands like AquaMax and the Premium Fish Foods site is that their ingredients list corn products. I think the corn products probably add to the quick growth seen using these other products. Either way, this is what I have and I am going to try it.