With Added Color Enhancer's. In the late spring when the warmer temperatures arrive, koi and goldfish need a boost of protein for growth since they depleted their fat reserves over the winter. In the fall a higher protein diet is also required since pond fish need to bulk up in preparation for their winter fast. Use this food at a minimum temperature of 68F (20C). Pond fish really start to grow at this temperature. You can use this food up to four times per day. Feed between 2% - 3% of the fishes' body weight per day.