Autumn is one time that your own environment can be a bit unpredictable as the weather changes fast, hot one day and cool and damp the next. Water temperatures in the fall months are going to be affected by the changing temperatures outdoors. The water is going to remain warmer a lot longer than the outdoor air is going to be warm, so you don’t have to worry to much about the fish as the temperatures drop and change quickly.
For the koi fish, they will begin to eat more as the weather gets cooler and the temperatures begin to drop because they are going to want to fatten up as they realize winter is setting in.
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