Reduce your fish feeding as the water temperatures drop below 60 degrees. Start feeding your fish a couple of times a week. We recommend switching to a wheat germ based fish food formulated for fall and spring feeding. When water temperatures drop below 60 degrees, the metabolism of your fish slows down. Both Tetra-Pond Spring/Fall and Microbe-Lift Cold Weather fish food are highly digestible cool weather diets that are made with less protein, but contain wheat germ, which is easily digested. They also contain higher levels of fat, which help your fish survive their winter hibernation. When water temperatures reach 50 degrees, stop feeding your fish completely. Feeding at water temperatures below 50 degrees can possibly kill your fish. A pond thermometer is a must have.