The goldfish have made it through, but every koi was dead. I have been tiling my kitchen so I have not had a chance to do a water test yet. I wonder if when we had 2 really cold snaps and the heater just couldn't keep up had something to do with it. I worried all winter about them, couldn't see through the ice and snow, but now I know.
My biggest koi would have been 4 this summer, he was a good 12 inches long and would eat from our hands. I will miss him.
Last fall I just KNEW I should bring them inside, but I couldn't get a big enough tank for a good enough price.
I think I may be done with koi. Between the herons pickeing them off and all the other issues, I think I will stick with goldies and let whatever happens to them, happen. it's too much stress.