Was it Jody Doles, or somebody else? I just looked through all of Jody's posts and I couldn't find anything I said. I remember the post vaguely.
Something about taking the number of feeding fish you have in the pond, then multiplying by average size to yield a total biomass. At this point you would use a conservative number of 1% of body weight to equal feed weight, or a more liberal number of 3%. You'll find that if you take the highs and lows of fish numbers, fish weight, and 1 or 3 percent you can get a widely divergent number for feed consumption.
I know I've mentioned this before, but in the movie "Old School", Will Ferrel gives a speech in a debate tournament. It's awesome, but two seconds later he has no idea what he just said...