The weather forecast did not show any (prolonged) frost anymore, so I decided to put the pond back together. Things are still slow and everything looks barren but I am doing it piece by piece. I know people were curious about the pond, so here is what the liner looks like empty and full. There is a pump in a box in the deeper end too, I forgot to take a picture. The box keeps debris away from the pump. I am hoping for some migration action this week!