I'll be using a mixture of the foods throughout the year, so for example growth food and also a colour booster food. Currently using saki-hikari but they ain't interested in that one bit but they'll happily woof down nishikoi wheatgerm. These are small koi 5-6inches long. My other pond love the saki so it's not wasted. Which would you prefer Kusuri or NT labs medikoi?