Don’t feed your fish when it’s cold
Fish need warmth to digest their food. Find out how much.
As a general rule, I don’t feed my fish when the water level is below sixty degrees. This is because the fish need warmth in order to process and digest their food.
There are some cold water foods made of wheat germ that can be used between 50 and 60 degrees, but in the spring time when it’s just going to be cold for a few days I simply choose not to feed them instead of bothering with changing foods. Your fish will be fine for a few days without food, and your pond will stay a lot cleaner without that undigested food being put out by your fish!