Hikari Wheatgerm Fish Food for Koi and Pond Fish. Hikari Wheatgerm is an excellent, easily digested, daily diet for Koi and other Pond Fish for use when water temperatures are cooler or improved digestion is desired. Hikari Wheatgerm is made from carefully selected high quality ingredients. Hikari Wheatgerm promotes improved fertility, body luster, abrasion healing and resistance to stress and stress related disease. Best of all the floating pellets won't cloud your water. Hikari Wheatgerm your first choice for superior growth and digestion in colder or variable temperatures.