For example, the bighead carp that could wipe out every living creature in the Great Lakes, eats half their weight in plankton every day. The Asian imports grow to 110 lbs. That is one bag of Mazuri Ogata a day per jumbo.
I don't think most people feed near enough. These koi feed voraciously. I have fed my koi 8 times today from daybreak on and they still act hungry. Say I have 30 koi that average 3 lbs., Oh my, that's 45 lbs of food a day. Maybe not quite that much but I am close to 10 lbs today and I am still going to feed more.