The research does not agree with what?
As previously stated, obviously not all fish food is created equally with regards to overall inclusion rates OR quality of raw ingredients, nutrient value, digestibility, etc, any more than are dog foods, cat foods, bird foods, etc. .
I'm not blindly agreeing with anything, or anyone's data, some of these feed trials, including my own, have been ongoing for decades. Where's your research? Where's your data to support that raw ingredients such as wheat, corn, or soy have zero nutrient value to a fish, and are only used to fill some kind of imaginary void in a pellet/flake food?
And just so there's no confusion on anyone's part, I am not advocating feeding corn products, soybean meal, or anything else to their fish. I am simply responding to some of the previous comments made in this discussion that had no validity to them.
In the absence of facts, everyone's an expert ........