I setup an 110g stock tank outdoors this past spring. I also cultured daphnia in sterilite bins and harvested mosquito larvae and string/hair algae to feed the fish. Fish go nuts for live foods. In addition to high quality commercial food blends, I am currently culturing daphnia, micro worms, grindal worms, and white worms in my basement. For the commercial blend I mix Omega One, Tetramin, and a bulk Premium Tropical Flakes (Ebay). I also quite like Almost Natural fish foods. Ed uses table quality fish in his blends.
New Life Spectrum and Ocean Nutrition are using WHOLE fish meals and minimizing grain/grain starch. There may be others. Buyer beware as fish foods made with low quality fish meal and copious amounts of grain/grain starch are inexpensive but just not as good. On the other hand, high quality fish foods can cost $2.50/oz. or more.
Interesting note: Not long ago I read an article that ingredient regulations are such that a company can list whole fish as the first ingredient, which may also include the ice it's packed in, But when processed to dry flake or pellet, the actual amount would likely be much lower in the ingredient list!
The article went so far as to indicate that the very best fish foods would list whole fish meals first in the ingredient list.
I've seen some fish foods that list salmon meal as the first ingredient...but it doesn't say WHOLE salmon meal. Does that mean it's just salmon processing waste (heads, bones, skin/fins)?