Koi Health- What food should I feed below 10°C?

Koi do not need a high protein level during the colder months, so wheatgerm is generally used during this period. It is lower in protein and higher in carbohydrates, providing the koi with the nourishment it needs. Ensure that Wheatgerm is the first ingredient on the bag. Reduce the amount that is fed, as their metabolism slows down considerably.