Altum,

I am off work today, so I did what you suggested, using the search you
designated in Google Scholar, "aquaculture koi carp diet" and 149 hits
were listed and not one supported anything that you said. That is not
to say that what you said is not valid, but it does suggest that what
without supporting documentation, it rates semi-close to an opinion,
like several others on this list who depend as not needing to support
their comments with research or quality documentation.

Tom L.L.