I have been away for a few days and returned today. When I went out to the pond I counted at least 10-12 baby koi. They are about 2 1/2" - 3" They must have came from an early spring spawn that I was not aware of. They are eating bug bite food and are swimming with the large koi. Will these babies make it through the winter my pond? Pond is 3000 gal and 3' deep. I live in Md. zone 7B. The pond is covered in the winter with reinforced poly which acts like a hot house. It very seldom freezes even when temps get into the 20's . Any advice would be appreciated.