In most parts of North America, water temperatures start to dip in early fall (September/October). Prepare for this by understanding how to start changing fish diets to accommodate the changes these cold-blooded creatures will undergo. We recommend following a Seasonal Feeding Cycle. When temperatures are between 39°F and 50°F, a wheat-germ based diet is best for your pond fish.
Wheat-germ is ideal to transition fish in (and out) of winter because it is highly digestible at low temperatures. This is especially important because in the colder months, fishes' metabolism and the pond's ammonia-reducing biological activity are greatly diminished. Since Koi and goldfish do not have true stomachs, this is the optimal diet to transition fish in and out of the season safely and in good health. Additionally, a food that is highly digestible minimizes waste, which allows the filtration system to work more effectively for a cleaner ecosystem. The next step in the Seasonal Feeding Cycle is to stop feeding fish when temperatures are 39°F or below.