Are you sure your pond is three feet deep? I would double check that first. Is your container 4 x 4 x 4? If so that is nearly 500 gallons and should be plenty of room to overwinter your fish inside if you so choose (you will however need filtration).
I am concerned with if the smaller fish will have the reserves to make it over winter. Are they on the skinny side or the plump side? Personally, seeing how you already have a 500 gallon tank, and the fish are small, I would be more inclined to let them spend the winter inside, but that is just me..........
I am concerned with if the smaller fish will have the reserves to make it over winter. Are they on the skinny side or the plump side? Personally, seeing how you already have a 500 gallon tank, and the fish are small, I would be more inclined to let them spend the winter inside, but that is just me..........