Thrive Koi Nourish Cool Water Diet Fish Food 10 Lbs. Bag Specially formulated for easy digestion during winter months. Includes wheat germ. Smaller 5mm Size for all fish types. Rich In Vitamins & Minerals, Low levels of Phosphorus To Reduce Environmental Impact Cool Weather Season Diet: 28% Protein Formulation. Fortified with probiotics to reduce fish waste. Packaged for Peak Freshness: All varieties of Thrive Koi Nutrition Fish Food Are Packaged In 5lb Poly Bags to maintain peak freshness. Open What You Need & Keep The Rest Sealed For Peak Freshness Until Needed FedEx Ground or FedEx Home Delivery