Day 55! 20 TUs left! I took a light out yesterday and could see lots and lots of little 1" fish moving at the bottom. The instructions say that once the TU's are met, they will swim out when the water temp is over 45, it's 47-48, so they should be swimming out soon. I had to create a small damn in the creek to focus the water to go into the pipes.. Woohoo!