Heck, I think if I understood it before now, was to feed all they can eat in less than 15 min, and like some of us, that could be 10 lbs before the bg quit eating it all in that time frame.
What I recommend is feed
*what* they can eat in less than 15 minutes, up to
all they can eat, depending on your pocketbook and what the goals are for your particular pond.
Meaning is the feed a supplement to the natural forage in the pond; is the feed the primary source of food in the pond or are you feeding for the enjoyment of watching the fish?
Feeding all they can eat in 15 minutes takes constant adjustment of the feeding amount due to the time of year and daily weather conditions so you don't waste food. i.e. what they will eat in 15 minutes today might not be what they eat in 15 minutes tomorrow.