NT Labs Wheatgerm & Garlic Koi Food 6mm Pellet ~ Protects your Koi from Parasites. If Koi have been moved or have gone off their food it is very effective at stimulating the appetite. When rapid growth is not a priority, it can be fed throughout the year. Wheatgerm with Garlic can be used as a substitute for Medikoi Beauty in the health food feeding regime. It can also be fed as a second choice whilst feeding Medikoi Health.