niiiiiiiice Koi!!! my parents are now on their 2nd pond (they upgraded to a bigger dug in one awhile ago) and they too overwinter theirs. Its waaaaaaaaaaay to much work for me (3 jobs, a soon to be 3 year old, and 3 dogs). lol my marine aquarium is all I am willing to deal with.
Where did you get your Koi from? They too after a few years of bringing them in for the winter just kept them outside and have a small wooden cover to help decrease snow buildup, use an deicer and a pretty strong pump to help with flow seems to work well for them. Interesting to see your set up (as always) since we do not see too many people with ponds and fish.
