Nishikoi Wheatgerm Fish Food – 975g Floating Pellets. Nishikoi Wheatgerm 975g is a premium, vegetable-based fish food designed for feeding pond fish during cooler spring and autumn months. With 20% protein and a high wheatgerm content, this low-protein formula is highly digestible, supporting fish health at lower temperatures and reducing ammonia excretion, which is essential during periods of reduced filter performance.