mine used to go from mid october until mid april when the temp was below 55. this
year, with a 500watt aquarium heater and plastic over the pond they went without from
mid january to mid february.
the koi will come up to you when they are ready to eat. give them very small amounts
of course until the temp is up over 65 and/or your filter is going good enough to
handle the wastes. Ingrid

Howard wrote:

So I stopped feeding the fish when the water went below 50F, that was back
in December, its still below that level and I'm assuming you wait until its
above 50F before u start feeding again.

How long can the fish go without eating?

I'm in Southern Ontario Canada



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