One of my Koi has cloudy eyes. They aren't swollen, none of the other fish have it, and the water parameters are fine. I think I first noticed it sometime last year, but I'm not sure what is causing it. Any ideas?
I started construction on the pond in February 2015, finished it in April 2016 and I rebuilt the moving bed filter and added a UV clarifier this year.
Here is a short video showing the pond and some of the fish:
I already lost one koi over the winter, and I found out that I lost another. Yesterday we cleaned the pond, and he was just missing. I am guessing a predatory bird ate him. I hadn't seen him in a while, so I assumed he was just hiding at the bottom of the pond, but he is gone. :(
Here are some pictures of my baby goldfish and koi. They are the ones that I found outside in the tubs that I keep pond plants in. At first I thought that all of them were goldfish, but at least one of them has barbels, so it is a koi. They are currently in two clear plastic tubs. The water...