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I'll try to answer some of these questions about feeding koi. Weight of food is based on dry weight of koi pellets. If you think about it the amount of nutrition in a pound of koi pellets is many many times greater than a pound of "natural food".
% of body weight is estimated using a lenght chart. If anyone wants a copy of my chart just email me it is in a excel file and you insert lenght and it calculates the weight. I would add or subtract a bit to compensate for heavier or lighter than average koi. In reality you fine tune the amount feed based on water quality and targeted koi development. For example, if you best koi is getting to fat or not growing enough I would sugest you adjust your feeding for that koi with the most potential.
Yes Futo reccomended different foods/feeding regemines for different koi ages/sexes and mud pond vs hobbyist pond.
Baby koi get a much higher protein pellet (50-60%) until harvested the first fall.
Koi do much better if seperated by sex and age until 4 years or older then only seperated by sex.
While in mud ponds feed both sinking and floating pellets. Because of very low stocking rates can usually feed at higher rates than in hobbyist ponds. Weather is also a significant factor when feeding in a mud pond. Days with heavy rain or bad weather koi are not fed. Water quality and koi condition are carefully monitored in mud ponds and feedings the same as in hobbyist ponds.
I can't help you with specifics of feeding tategoi. When asked these questions just told that it is secret. I do know they are not fed and color enhansers and are not grown as rapidily but grown for maximum development. Also some natural foods are added vs just feeing pellets.
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