I'm so happy that our koi fish survived the winter. At one point, before we added a stock tank heater, their pond was almost frozen solid! All 6 of our fish survived the freeze and thaw! yay!
I recently added a few hidey places for our Koi fish pond. The 6 koi seem to appreciate the rocks and roofing tile to hide under.The white Koi seems to appreciate it the most.