Microbe-Lift Wheat Germ contains stabilized vitamin C and Probiotics that produce enzymes to help break down carbohydrates, protein and fat. In cold weather during spring and fall when the nighttime temperature goes below 55 F (13 c) feed the Cold Weather formula. When the pond water's temperature drops, the fish require a highly digestible cool-water diet. The cold-water diet is made with lesser amounts of protein but contains wheat germ, which is easily digested and also contains a higher level of fats. Microbe-Lift Wheat Germ is one of the best autumn/spring Koi foods available.