Guys there are lots of studies (aquaculture) on fish feeds and their performance. Bill's comments are on point and so is Bruce's on considering the species of fish. They are each different. Keep in mind that most of those studies are on fish at hatcheries/aquaculture operations where feed is the diet (limited natural food). That makes a big difference. Goals , goals , goals -- supplemental feeding or dependent feeding. There is material here on protein and feed make up and species.

I only use sinking feed , in limited circumstances and in winter or for fry/fingerlings.